Bump werkzeug from 2.2.2 to 3.0.3 in /Backend

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 2.2.2 to 3.0.3.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@2.2.2...3.0.3)

---
updated-dependencies:
- dependency-name: werkzeug
  dependency-type: direct:production
...

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

Backend/requirements.txt

@@ -74,5 +74,5 @@ tzdata==2024.1
 urllib3==1.26.18
 wcwidth==0.2.13
 webencodings==0.5.1
-Werkzeug==2.2.2
+Werkzeug==3.0.3
 yarg==0.1.9