Update dependency flask to v2.0.3

Author: renovate-bot

requirements.txt

@@ -5,7 +5,7 @@ colorama==0.4.4; python_version >= "3.6" and python_full_version < "3.0.0" and p
 ddtrace==0.57.3; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.5.0")
 faker==8.11.0; python_version >= "3.6"
 flask-assets==2.0
-flask==2.0.1; python_version >= "3.6"
+flask==2.0.3; python_version >= "3.6"
 idna==3.2; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.5"
 itsdangerous==2.0.1; python_version >= "3.6"
 jinja2==3.0.1; python_version >= "3.6"