Bump whitenoise from 6.7.0 to 6.9.0

Bumps [whitenoise](https://github.com/evansd/whitenoise) from 6.7.0 to 6.9.0.
- [Changelog](https://github.com/evansd/whitenoise/blob/main/docs/changelog.rst)
- [Commits](evansd/whitenoise@6.7.0...6.9.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 Django==5.1.6
 psycopg2-binary==2.9.9
 python-dotenv==1.0.1
-whitenoise==6.7.0
+whitenoise==6.9.0
 django-redis==5.4.0