Adjusted test

Author: oandreeva-nv

ci/L0_backend_vllm/metrics_test/vllm_metrics_test.py

@@ -191,7 +191,7 @@ def test_custom_sampling_params(self):
         metrics_dict = self.parse_vllm_metrics()
         # vllm:request_params_n
         self.assertIn("vllm:request_params_n_count", metrics_dict)
-        self.assertEqual("vllm:request_params_n_bucket", metrics_dict)
+        self.assertIn("vllm:request_params_n_bucket", metrics_dict)
 
     def test_vllm_metrics_disabled(self):
         # Test vLLM metrics