Bump sphinx-notfound-page from 0.8.3 to 1.0.0 in /requirements (#1149)

Bumps [sphinx-notfound-page](https://github.com/readthedocs/sphinx-notfound-page) from 0.8.3 to 1.0.0.
- [Changelog](https://github.com/readthedocs/sphinx-notfound-page/blob/main/CHANGELOG.rst)
- [Commits](readthedocs/sphinx-notfound-page@0.8.3...1.0.0)

---
updated-dependencies:
- dependency-name: sphinx-notfound-page
  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>
Co-authored-by: Paul Profizi <[email protected]>

requirements/requirements_docs.txt

@@ -11,6 +11,6 @@ sphinx==5.3.0
 sphinx-autobuild==2021.3.14
 sphinx-copybutton==0.5.0
 sphinx-gallery==0.11.0
-sphinx-notfound-page==0.8.3
+sphinx-notfound-page==1.0.0
 sphinx_design==0.5.0
 sphinxcontrib-napoleon==0.7