update loading instructions

README.md

@@ -35,9 +35,10 @@ tags:
 To load the quantized model, you can do as follows:
 
 ```python
-from optimum.intel.neural_compressor.quantization import IncQuantizedModelForSequenceClassification
+from optimum.intel import INCModelForSequenceClassification
 
-model = IncQuantizedModelForSequenceClassification.from_pretrained("Intel/distilbert-base-uncased-MRPC-int8-static")
+model_id = "Intel/distilbert-base-uncased-MRPC-int8-static"
+model = INCModelForSequenceClassification.from_pretrained(model_id)
 ```
 
 #### Test result