Bump werkzeug from 3.0.3 to 3.0.6 in /server in the pip group

Bumps the pip group in /server with 1 update: [werkzeug](https://github.com/pallets/werkzeug).


Updates `werkzeug` from 3.0.3 to 3.0.6
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@3.0.3...3.0.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

server/requirements.txt

@@ -18,5 +18,5 @@ six==1.16.0
 tenacity==8.2.3
 typing_extensions==4.8.0
 tzdata==2023.3
-Werkzeug==3.0.3
+Werkzeug==3.0.6
 WTForms==3.0.1