Creating subgroups results in raised exception for 204 No Content

[kereis]

When using KeycloakAdmin.create_group() with a set parent= parameter in order to create subgroups, the method raises an exception even if the operation is successful. This is because the API returns HTTP status code 204 No content, which KeycloakAdmin does not expect.

python-keycloak/src/keycloak/keycloak_admin.py

Lines 1347 to 1349 in 5957607

	raise_error_from_response(
	data_raw, KeycloakPostError, expected_codes=[201], skip_exists=skip_exists
	)

You'd probably just have to add 204 to expected_codes in order to fix that issue. I can create a PR if that fixes the issue.