Bump django-cors-headers from 3.8.0 to 3.9.0

Bumps [django-cors-headers](https://github.com/adamchainz/django-cors-headers) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/adamchainz/django-cors-headers/releases)
- [Changelog](https://github.com/adamchainz/django-cors-headers/blob/main/HISTORY.rst)
- [Commits](adamchainz/django-cors-headers@3.8.0...3.9.0)

---
updated-dependencies:
- dependency-name: django-cors-headers
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -5,7 +5,7 @@ whitenoise==5.3.0 #serving swagger static files
 djangorestframework==3.12.4
 pylint==2.11.1
 pydash==5.0.2
-django-cors-headers==3.8.0
+django-cors-headers==3.9.0
 pyyaml==5.4.1
 colour_runner==0.1.1
 boto3==1.18.49