Bump flask from 2.3.3 to 3.0.1

Bumps [flask](https://github.com/pallets/flask) from 2.3.3 to 3.0.1.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@2.3.3...3.0.1)

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

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

requirements.txt

@@ -4,7 +4,7 @@ blinker==1.7.0
 Bootstrap-Flask==2.3.3
 click==8.1.7
 dill==0.3.7
-Flask==2.3.3
+Flask==3.0.1
 Flask-CKEditor==0.4.6
 Flask-Login==0.6.3
 Flask-SQLAlchemy==3.1.1