Bump whitenoise from 6.8.2 to 6.9.0

Bumps [whitenoise](https://github.com/evansd/whitenoise) from 6.8.2 to 6.9.0.
- [Changelog](https://github.com/evansd/whitenoise/blob/main/docs/changelog.rst)
- [Commits](evansd/whitenoise@6.8.2...6.9.0)

---
updated-dependencies:
- dependency-name: whitenoise
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -48,7 +48,7 @@ typing-extensions = "^4.12.2"
 Unidecode = "^1.3.8"
 uritemplate = "^4.1.1"
 urllib3 = "^2.3.0"
-whitenoise = "^6.8.2"
+whitenoise = "^6.9.0"
 Django = "^5.1"
 mozilla-django-oidc = "^4.0.1"
 Authlib = "^1.4.1"