Bump the pip group across 1 directory with 2 updates

Bumps the pip group with 2 updates in the /backend directory: [flask-cors](https://github.com/corydolphin/flask-cors) and [werkzeug](https://github.com/pallets/werkzeug).


Updates `flask-cors` from 4.0.0 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](https://github.com/corydolphin/flask-cors/compare/4.0.0...6.0.0)

Updates `werkzeug` from 3.0.1 to 3.1.4
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/werkzeug/compare/3.0.1...3.1.4)

---
updated-dependencies:
- dependency-name: flask-cors
  dependency-version: 6.0.0
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: werkzeug
  dependency-version: 3.1.4
  dependency-type: direct:production
  dependency-group: pip
...

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

backend/requirements.txt

@@ -1,7 +1,7 @@
 Flask==3.0.0
-Flask-CORS==4.0.0
+Flask-CORS==6.0.0
 pyjwt==2.8.0
 rocksdict==0.3.23
-werkzeug==3.0.1
+werkzeug==3.1.4
 jsonschema==4.20.0
 bcrypt==4.1.2