Bump django-tinymce from 3.6.1 to 4.0.0

Bumps [django-tinymce](https://github.com/jazzband/django-tinymce) from 3.6.1 to 4.0.0.
- [Release notes](https://github.com/jazzband/django-tinymce/releases)
- [Changelog](https://github.com/jazzband/django-tinymce/blob/master/CHANGELOG.rst)
- [Commits](jazzband/django-tinymce@3.6.1...4.0.0)

---
updated-dependencies:
- dependency-name: django-tinymce
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -2,7 +2,7 @@ asgiref==3.7.2
 dj-database-url==2.1.0
 Django==4.2.7
 django-heroku==0.3.1
-django-tinymce==3.6.1
+django-tinymce==4.0.0
 gunicorn==21.2.0
 psycopg2==2.9.9
 python-dotenv==1.0.1