Bump sphinx-notfound-page from 1.0.0 to 1.0.2 in /requirements

Bumps [sphinx-notfound-page](https://github.com/readthedocs/sphinx-notfound-page) from 1.0.0 to 1.0.2.
- [Changelog](https://github.com/readthedocs/sphinx-notfound-page/blob/main/CHANGELOG.rst)
- [Commits](readthedocs/sphinx-notfound-page@1.0.0...1.0.2)

---
updated-dependencies:
- dependency-name: sphinx-notfound-page
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements/requirements_doc.txt

@@ -26,4 +26,4 @@ sphinxcontrib-websupport==1.2.7
 sphinx-copybutton==0.5.2
 sphinxemoji==0.3.1
 sphinx-gallery==0.16.0
-sphinx-notfound-page==1.0.0
+sphinx-notfound-page==1.0.2