fix(deps): update dependency flask to v3 [security]

Author: renovate[bot]

pyproject.toml

@@ -34,7 +34,7 @@ docopt = "0.6.2"
 environs = "9.5.0"       # pyup: <9.3.3 # marshmallow v3 throws errors"
 fido2 = "1.2.0"
 #git+https://github.com/mitsuhiko/flask-sqlalchemy.git@500e732dd1b975a56ab06a46bd1a20a21e682262#egg=Flask-SQLAlchemy==2.3.2.dev20190108
-Flask = "2.3.3"
+Flask = "3.1.3"
 Flask-Bcrypt = "1.0.1"
 flask-marshmallow = "0.14.0"
 Flask-Migrate = "2.7.0"