Update django-compressor requirement from ~=3.1 to ~=4.0

Updates the requirements on [django-compressor](https://github.com/django-compressor/django-compressor) to permit the latest version.
- [Release notes](https://github.com/django-compressor/django-compressor/releases)
- [Changelog](https://github.com/django-compressor/django-compressor/blob/develop/docs/changelog.txt)
- [Commits](django-compressor/django-compressor@3.1...4.0)

---
updated-dependencies:
- dependency-name: django-compressor
  dependency-type: direct:production
...

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

requirements.txt

@@ -9,7 +9,7 @@ django-formtools~=2.3
 django-recaptcha~=3.0.0
 Django~=3.2
 django-crispy-forms~=1.14
-django_compressor~=3.1
+django_compressor~=4.0
 django_extensions~=3.1
 django-storages~=1.12
 django-environ==0.8.1