Bump django-auth-ldap from 3.0.0 to 4.0.0

Bumps [django-auth-ldap](https://github.com/django-auth-ldap/django-auth-ldap) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/django-auth-ldap/django-auth-ldap/releases)
- [Changelog](https://github.com/django-auth-ldap/django-auth-ldap/blob/master/CHANGES)
- [Commits](https://github.com/django-auth-ldap/django-auth-ldap/compare/3.0.0...4.0.0)

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

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

requirements.txt

@@ -41,5 +41,5 @@ boto3==1.20.26
 django-prometheus==2.1.0
 django-hCaptcha==0.1.0
 python-ldap==3.4.0
-django-auth-ldap==3.0.0
+django-auth-ldap==4.0.0
 pytest-factoryboy==2.1.0