Update dependency flask to v3.1.0

Author: renovate[bot]

requirements.txt

@@ -7,7 +7,7 @@ exceptiongroup==1.2.2 ; python_version >= "3.10" and python_version < "3.11"
 flake8==7.1.1 ; python_version >= "3.10" and python_version < "4.0"
 flask-assets==2.1.0 ; python_version >= "3.10" and python_version < "4.0"
 flask-sock==0.7.0 ; python_version >= "3.10" and python_version < "4.0"
-flask==3.0.3 ; python_version >= "3.10" and python_version < "4.0"
+flask==3.1.0 ; python_version >= "3.10" and python_version < "4.0"
 gunicorn==23.0.0 ; python_version >= "3.10" and python_version < "4.0"
 h11==0.14.0 ; python_version >= "3.10" and python_version < "4.0"
 iniconfig==2.0.0 ; python_version >= "3.10" and python_version < "4.0"