fix: 🐛 failed response labelled unknown incorrectly

Author: newgene

src/utils/monitor.py

@@ -140,7 +140,7 @@ def test_endpoint(self, _endpoint, _endpoint_info):
                 self._uptime_msg.append(_endpoint + ": " + type(exception).__name__)
                 return 'fail'
             else:
-                if response:
+                if isinstance(response,  requests.models.Response):
                     status = endpoint.check_response_status(response)
                     cors = endpoint.check_cors_status(response)