add openvino tag if not already

app.py

@@ -168,7 +168,8 @@ def quantize_model(
 
                 if card.data.tags is None:
                     card.data.tags = []
-                card.data.tags.append("openvino")
+                if "openvino" not in card.data.tags:
+                    card.data.tags.append("openvino")
                 card.data.tags.append("nncf")
                 card.data.tags.append(dtype)
                 card.data.base_model = model_id