chore(deps): update dependency whitenoise to v6.9.0

Author: renovate[bot]

requirements.txt

@@ -8,6 +8,6 @@ djangorestframework==3.15.2
 psycopg==3.2.1
 python-dateutil==2.9.0.post0
 tqdm==4.66.5
-whitenoise==6.7.0
+whitenoise==6.9.0
 brotli==1.1.0
 sentry-sdk==2.12.0