Bump flask from 2.1.2 to 2.2.2

Bumps [flask](https://github.com/pallets/flask) from 2.1.2 to 2.2.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@2.1.2...2.2.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -2,7 +2,7 @@ Authlib==0.15.5
 boto3==1.24.21
 email-validator==1.2.1
 Fabric3==1.14.post1
-Flask==2.1.2
+Flask==2.2.2
 Flask-Bootstrap==3.3.7.1
 Flask-Limiter==2.6.0
 Flask-Login==0.6.2