Documentation Updates

Insert cautionary comment to method Document.new_page.

Update the API of package PyMuPDF4LLM

Update version numbers and dates for release.

Update version numbers and dates for release.

Update version numbers and dates for release.

tests/test_memory.py: avoid spurious failures on non-linux.

Non-Linux machines have unreliable RSS values on Github.

scripts/gh_release.py: fixed to match lower-case sdist and wheel names.

setup.py: incremented default mupdf version to 1.24.11.

Update changelog, version numbers and dates for release of 1.24.13.

changes.txt: fixed incorrect list of supported Python versions - is 3…

….9-3.13.

Update version numbers and dates for release of 1.24.11.