Bump django-cors-headers from 4.2.0 to 4.3.0 in /requirements

Bumps [django-cors-headers](https://github.com/adamchainz/django-cors-headers) from 4.2.0 to 4.3.0.
- [Changelog](https://github.com/adamchainz/django-cors-headers/blob/main/CHANGELOG.rst)
- [Commits](adamchainz/django-cors-headers@4.2.0...4.3.0)

---
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>

requirements/prod.txt

@@ -1,6 +1,6 @@
 ansi2html==1.8.0
 Django==4.2.5
-django-cors-headers==4.2.0
+django-cors-headers==4.3.0
 django-currentuser==0.6.1
 djangorestframework==3.14.0
 djangorestframework-simplejwt==5.3.0