Update whitenoise requirement from <6.5,>=5.2 to >=5.2,<6.6

Updates the requirements on [whitenoise](https://github.com/evansd/whitenoise) to permit the latest version.
- [Changelog](https://github.com/evansd/whitenoise/blob/main/docs/changelog.rst)
- [Commits](https://github.com/evansd/whitenoise/compare/v5.2.0...6.5.0)

---
updated-dependencies:
- dependency-name: whitenoise
  dependency-type: direct:production
...

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

requirements.txt

@@ -13,7 +13,7 @@ pysolr>=3.9,<3.10
 redis>=3.5,<4.6
 requests>=2.25,<3
 uWSGI>=2.0.19
-whitenoise>=5.2,<6.5
+whitenoise>=5.2,<6.6
 
 # Linting
 pylint>=2.17.4