Bump flask from 3.1.0 to 3.1.1

Bumps [flask](https://github.com/pallets/flask) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/flask/compare/3.1.0...3.1.1)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -26,7 +26,7 @@ click-repl = "==0.3.0"
 deprecated = "==1.2.14"
 eventlet = "==0.36.1"
 expiringdict = "==1.2.2"
-flask = "~=3.0"
+flask = "~=3.1"
 flask-bcrypt = "==1.0.1"
 flask-marshmallow = "==1.2.1"
 flask-migrate = "==4.1.0"