chore: fix naming to match test case

Signed-off-by: Zack Koppert <zkoppert@github.com>

Author: zkoppert

test_auth.py

@@ -110,7 +110,7 @@ def test_get_github_app_installation_token_request_failure(self, mock_post):
         self.assertIsNone(result)
 
     @patch("github3.login")
-    def test_auth_to_github_missing_credentials(self, mock_login):
+    def test_auth_to_github_invalid_credentials(self, mock_login):
         """
         Test the auth_to_github function raises correct ValueError
         when credentials are present but incorrect.