Bump flask-sqlalchemy from 2.4.4 to 3.1.1

Bumps [flask-sqlalchemy](https://github.com/pallets-eco/flask-sqlalchemy) from 2.4.4 to 3.1.1.
- [Release notes](https://github.com/pallets-eco/flask-sqlalchemy/releases)
- [Changelog](https://github.com/pallets-eco/flask-sqlalchemy/blob/main/CHANGES.rst)
- [Commits](pallets-eco/flask-sqlalchemy@2.4.4...3.1.1)

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

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

requirements.txt

@@ -6,4 +6,4 @@ requests-mock~=1.6.0
 werkzeug==0.15.4
 wtforms==2.3.3
 SQLAlchemy==1.3.23 
-Flask-SQLAlchemy==2.4.4
+Flask-SQLAlchemy==3.1.1