Bump flask from 3.1.1 to 3.1.2

Bumps [flask](https://github.com/pallets/flask) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.1.1...3.1.2)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-flask==3.1.1
+flask==3.1.2
 flask-login==0.6.3
 flask-wtf==1.2.2
 werkzeug==3.1.3