Bump sphinx from 4.5.0 to 5.0.1 (#1244)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 4.5.0 to 5.0.1.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/5.x/CHANGES)
- [Commits](sphinx-doc/sphinx@v4.5.0...v5.0.1)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements_docs.txt

@@ -4,7 +4,7 @@ imageio==2.19.3
 imageio-ffmpeg==0.4.7
 pyvista==0.34.1
 numpydoc==1.4.0
-Sphinx==4.5.0
+Sphinx==5.0.1
 sphinx-autobuild==2021.3.14
 sphinxcontrib-websupport==1.2.4
 pytest-sphinx==0.4.0