Update django-cors-headers to 4.3.0 (#4625)

{{cookiecutter.project_slug}}/requirements/base.txt

@@ -41,7 +41,7 @@ django-redis==5.4.0  # https://github.com/jazzband/django-redis
 {%- if cookiecutter.use_drf == 'y' %}
 # Django REST Framework
 djangorestframework==3.14.0  # https://github.com/encode/django-rest-framework
-django-cors-headers==4.2.0  # https://github.com/adamchainz/django-cors-headers
+django-cors-headers==4.3.0  # https://github.com/adamchainz/django-cors-headers
 # DRF-spectacular for api documentation
 drf-spectacular==0.26.5  # https://github.com/tfranzel/drf-spectacular
 {%- endif %}