Unable to disable restrictions by using a "null" value.

[scoopex]

The Github API (https://docs.github.com/de/rest/branches/branch-protection?apiVersion=2022-11-28#update-branch-protection) describes that you have to set the value to "null" to completely disable restrictions in the org

Due to the fact that the Ansible parameter validation specified and checks in github_org_repository.py
that this value needs to be a dict, the traditional way to set this value to "null" in the yaml file
is not valid anymore with recent ansible implementations.

[scoopex]

The changes included in https://github.com/opentelekomcloud/ansible-collection-gitcontrol/pull/44/files solve this problem.