Skip test if github cannot be imported.

It currently cannot be imported because nacl isn't compatible with Python 3.14 yet,
and importing github indirectly tries to import nacl, which fails as it uses a
type from typing that got removed in 3.14.

tests/unit/plugins/modules/test_github_repo.py

@@ -7,11 +7,15 @@ __metaclass__ = type
 
 import re
 import json
+import pytest
 from httmock import with_httmock, urlmatch, response
 from ansible_collections.community.internal_test_tools.tests.unit.compat import unittest
 from ansible_collections.community.general.plugins.modules import github_repo
 
 
+pytest.importorskip('github')
+
+
 @urlmatch(netloc=r'.*')
 def debug_mock(url, request):
     print(request.original.__dict__)