chore(deps): bump flask-cors (#13374)

Bumps [flask-cors](https://github.com/corydolphin/flask-cors) from 3.0.10 to 6.0.0.
- [Release notes](https://github.com/corydolphin/flask-cors/releases)
- [Changelog](https://github.com/corydolphin/flask-cors/blob/main/CHANGELOG.md)
- [Commits](corydolphin/flask-cors@3.0.10...6.0.0)

---
updated-dependencies:
- dependency-name: flask-cors
  dependency-version: 6.0.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

appengine/standard/firebase/firenotes/backend/requirements.txt

@@ -1,7 +1,7 @@
 Flask==1.1.4; python_version < '3.0'
 Flask==3.0.0; python_version > '3.0'
 pyjwt==1.7.1; python_version < '3.0'
-flask-cors==3.0.10
+flask-cors==6.0.0
 google-auth==2.17.3; python_version < '3.0'
 google-auth==2.17.3; python_version > '3.0'
 requests==2.27.1