python-f5-sdk fails to build with Sphinx 4.0.2 in Fedora 35 (currently Rawhide).

+ make html
sphinx-build -b html -d _build/doctrees   . _build/html
Running Sphinx v4.0.2
making output directory... done
Exception occurred:
  File "/builddir/build/BUILD/f5-common-python-3.0.21/docs/conf.py", line 361, in setup
    app.add_stylesheet('theme_overrides.css')
AttributeError: 'Sphinx' object has no attribute 'add_stylesheet'

For the logs from testing build attempts, see:
https://copr.fedorainfracloud.org/coprs/ksurma/pygments-2.9.0/package/python-f5-sdk/

Possible solution for this issue:
In some cases it may be enough to replace the call to 'add_stylesheet' with 'add_css_file' instead.

You can test you package using Koji scratch build
koji build --scratch <srpm>

For details regarding the Sphinx change, see https://fedoraproject.org/wiki/Changes/Sphinx4
Let us know here if you have any questions. Thank you!