use canonical filename of RTD configuration and enable nitpicky mode

[zacharyburnett]

Description

update the name of the ReadTheDocs configuration file from .readthedocs.yml to .readthedocs.yaml and enable nitpicky to validate intra-doc links

[codecov]

Codecov Report

Base: 94.46% // Head: 94.46% // No change to project coverage 👍

Coverage data is based on head (665a27f) compared to base (3a80de6).
Patch has no changes to coverable lines.

❗ Current head 665a27f differs from pull request most recent head fd03b3b. Consider uploading reports for the commit fd03b3b to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #337   +/-   ##
=======================================
  Coverage   94.46%   94.46%           
=======================================
  Files          17       17           
  Lines        2096     2096           
=======================================
  Hits         1980     1980           
  Misses        116      116           

Impacted Files	Coverage Δ
synphot/observation.py	99.06% <ø> (ø)
synphot/specio.py	99.09% <ø> (ø)
synphot/spectrum.py	99.33% <ø> (ø)
synphot/units.py	91.72% <ø> (ø)
synphot/utils.py	98.00% <ø> (ø)

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[zacharyburnett]

the RTD build ran into a few errors / warnings: https://readthedocs.org/projects/synphot/builds/18123748/

/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/models.py:docstring of synphot.models.Gaussian1D:1: WARNING: py:class reference target not found: synphot.models.BaseGaussian1D
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/models.py:docstring of synphot.models.GaussianAbsorption1D:1: WARNING: py:class reference target not found: synphot.models.BaseGaussian1D
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/observation.py:docstring of synphot.observation.Observation.effstim:12: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/observation.py:docstring of synphot.observation.Observation.plot:20: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/observation.py:docstring of synphot.observation.Observation.sample_binned:15: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/specio.py:docstring of synphot.specio.read_ascii_spec:19: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/specio.py:docstring of synphot.specio.read_ascii_spec:22: WARNING: py:func reference target not found: astropy.io.ascii.ui.read
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/specio.py:docstring of synphot.specio.read_fits_spec:23: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/specio.py:docstring of synphot.specio.write_fits_spec:53: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/spectrum.py:docstring of synphot.spectrum.BaseSourceSpectrum.__call__:13: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/spectrum.py:docstring of synphot.spectrum.BaseSpectrum:12: WARNING: py:obj reference target not found: astropy.modeling.models
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/spectrum.py:docstring of synphot.spectrum.BaseSpectrum.integrate:38: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/spectrum.py:docstring of synphot.spectrum.BaseSpectrum.to_spectrum1d:16: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/spectrum.py:docstring of synphot.spectrum.SourceSpectrum.plot:15: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/spectrum.py:docstring of synphot.spectrum.SourceSpectrum.to_fits:17: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/spectrum.py:docstring of synphot.spectrum.SpectralElement.check_overlap:35: WARNING: py:obj reference target not found: waveset
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/spectrum.py:docstring of synphot.spectrum.SpectralElement.equivwidth:8: WARNING: py:meth reference target not found: integrate
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/units.py:docstring of synphot.units.convert_flux:15: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/units.py:docstring of synphot.units.validate_quantity:15: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/units.py:docstring of synphot.units.validate_unit:14: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/units.py:docstring of synphot.units.validate_unit:22: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/envs/337/lib/python3.9/site-packages/synphot/utils.py:docstring of synphot.utils.generate_wavelengths:27: WARNING: py:obj reference target not found: astropy.units.core.Unit
/home/docs/checkouts/readthedocs.org/user_builds/synphot/checkouts/337/docs/<rst_epilog>:3: WARNING: py:class reference target not found: synphot.models.BaseGaussian1D

[pllim]

I would approve if you also fix the 23 warnings. Thanks! 😉

[pllim]

One does not simply turn on nitpicky.

[pllim]

Thanks!