Upgrade: Bump werkzeug from 3.0.3 to 3.0.6

Bumps [werkzeug](https://github.com/pallets/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
...

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

requirements.txt

@@ -12,5 +12,5 @@ openttd-helpers==1.4.0
 requests==2.32.3
 sentry-sdk==2.7.1
 urllib3==2.2.2
-Werkzeug==3.0.3
+Werkzeug==3.0.6
 zipp==3.19.2