Fix the failing test

Signed-off-by: Lukasz Gryglicki <[email protected]>

Assisted by [OpenAI](https://platform.openai.com/)

Assisted by [GitHub Copilot](https://github.com/features/copilot)

Author: lukaszgryglicki

cla-backend/cla/tests/unit/test_github_models.py

@@ -64,7 +64,7 @@ def test_get_co_author_commits_invalid_gh_email(self, mock_github_instance):
         installation_id = 123
 
         # Call the function
-        result, _ = get_co_author_commits(co_author,commit, pr, installation_id)
+        result, _ = get_co_author_commits(co_author, commit.sha, pr, installation_id)
 
         # Assertions
         self.assertEqual(result.commit_sha, "fake_sha")
@@ -87,7 +87,7 @@ def test_get_co_author_commits_valid_gh_email(self, mock_github_instance):
         installation_id = 123
 
         # Call the function
-        result, _ = get_co_author_commits(co_author,commit, pr, installation_id)
+        result, _ = get_co_author_commits(co_author, commit.sha, pr, installation_id)
 
         # Assertions
         self.assertEqual(result.commit_sha, "fake_sha")