bump sphinx (#144)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs/source/conf.py

@@ -79,7 +79,7 @@ def _convert_markdown(path_in: str, path_out: str) -> None:
 
 # If your documentation needs a minimal Sphinx version, state it here.
 
-needs_sphinx = "4.0"
+needs_sphinx = "6.2"
 
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
@@ -137,7 +137,7 @@ def _convert_markdown(path_in: str, path_out: str) -> None:
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = "en"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.

requirements/docs.txt

@@ -1,17 +1,16 @@
-sphinx>=4.0,<5.0
-myst-parser>=0.15
-nbsphinx>=0.8.5
+sphinx >=6.0,<7.0
+myst-parser >=2.0.0, <3.0.0
+nbsphinx >=0.8.5
 ipython[notebook]
-pandoc>=1.0
-docutils>=0.16
+pandoc >=1.0
+docutils >=0.16
 # https://github.com/jupyterlab/jupyterlab_pygments/issues/5
-pygments>=2.4.1
-sphinxcontrib-fulltoc>=1.0
+pygments >=2.4.1
+sphinxcontrib-fulltoc >=1.0
 sphinxcontrib-mockautodoc
 
 pt-lightning-sphinx-theme @ https://github.com/Lightning-AI/lightning_sphinx_theme/archive/master.zip
-sphinx-autodoc-typehints>=1.0
-sphinx-paramlinks>=0.5.1
-sphinx-togglebutton>=0.2
-sphinx-copybutton>=0.3
-jinja2>=3.0.0,<3.1.0
+sphinx-autodoc-typehints >=1.0
+sphinx-paramlinks >=0.5.1
+sphinx-togglebutton >=0.2
+sphinx-copybutton >=0.3