build(deps): bump flask from 3.0.2 to 3.0.3

Bumps [flask](https://github.com/pallets/flask) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/flask/compare/3.0.2...3.0.3)

---
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

@@ -31,7 +31,7 @@ extras==1.0.0
 feedgen==1.0.0
 feedparser==6.0.11
 fixtures==4.1.0
-Flask==3.0.2
+Flask==3.0.3
 Flask-Caching==2.1.0
 flask-gae-static==1.0
 flask-sock==0.7.0