fix: update test docstring to match /settings route path

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: galshubeli

tests/test_settings_route.py

@@ -41,7 +41,7 @@ def test_custom_vendor_and_model(self):
 
 
 class TestValidateApiKeyEndpoint:
-    """Tests for the /validate-api-key endpoint logic."""
+    """Tests for the /settings/validate-api-key endpoint logic."""
 
     @pytest.fixture
     def mock_request(self):