chore(deps): bump flask from 3.0.3 to 3.1.0 in /docs

Bumps [flask](https://github.com/pallets/flask) from 3.0.3 to 3.1.0.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.0.3...3.1.0)

---
updated-dependencies:
- dependency-name: flask
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

docs/requirements.txt

@@ -2,4 +2,4 @@ furo==2024.8.6
 sphinx==7.2.6
 sphinx-click==6.0.0
 myst_parser==3.0.1
-flask==3.0.3
+flask==3.1.0