Bump whitenoise from 3.3.1 to 5.2.0

Bumps [whitenoise](https://github.com/evansd/whitenoise) from 3.3.1 to 5.2.0.
- [Release notes](https://github.com/evansd/whitenoise/releases)
- [Changelog](https://github.com/evansd/whitenoise/blob/master/docs/changelog.rst)
- [Commits](evansd/whitenoise@v3.3.1...v5.2.0)

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

requirements.txt

@@ -1,4 +1,4 @@
-whitenoise==3.3.1
+whitenoise==5.2.0
 gunicorn==20.0.4
 dj-database-url==0.5.0
 psycopg2==2.8.6