Bump flask from 2.3.2 to 2.3.3

Bumps [flask](https://github.com/pallets/flask) from 2.3.2 to 2.3.3.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@2.3.2...2.3.3)

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

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

requirements.txt

@@ -3,7 +3,7 @@ autobahn==23.6.2
 beautifulsoup4==4.12.2
 colorama==0.4.6
 cssmin==0.2.0
-Flask==2.3.2
+Flask==2.3.3
 Flask-Assets==2.0
 irc==20.1.0
 isodate==0.6.1