chore(doc): bump sphinx-notfound-page

Bumps the github-actions group in /doc with 1 update: [sphinx-notfound-page](https://github.com/readthedocs/sphinx-notfound-page).


Updates `sphinx-notfound-page` from 1.0.4 to 1.1.0
- [Changelog](https://github.com/readthedocs/sphinx-notfound-page/blob/main/CHANGELOG.rst)
- [Commits](readthedocs/sphinx-notfound-page@1.0.4...1.1.0)

---
updated-dependencies:
- dependency-name: sphinx-notfound-page
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

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

Author: dependabot[bot]

doc/requirements.txt

@@ -3,4 +3,4 @@ exhale==0.3.7
 myst-parser==4.0.0
 myst-parser[linkify]
 sphinx==8.1.3
-sphinx-notfound-page==1.0.4
+sphinx-notfound-page==1.1.0