Bump flask from 3.0.0 to 3.1.0

Bumps [flask](https://github.com/pallets/flask) from 3.0.0 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@3.0.0...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]>

Author: dependabot[bot]

requirements.txt

@@ -5,7 +5,7 @@ click==8.1.7
 cryptography==43.0.1
 dnspython==2.6.1
 email-validator==2.1.0.post1
-Flask==3.0.0
+Flask==3.1.0
 Flask-Login==0.6.3
 Flask-Mail==0.9.1
 Flask-Migrate==4.0.5