Bump whitenoise from 6.7.0 to 6.9.0 in /{{cookiecutter.project_slug}} (#861)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

{{cookiecutter.project_slug}}/Pipfile

@@ -16,7 +16,7 @@ django-environ = "~=0.11.2"
 django-storages = "~=1.14"
 psycopg2 = "<=2.9.9"
 waitress = "~=3.0.2"
-whitenoise = "~=6.7.0"
+whitenoise = "~=6.9.0"
 djangorestframework = "~=3.15.1"
 django-bootstrap4 = "~=22.1"
 django-allauth = "~=0.63.6"