Update README.md

add itrex inference eg

README.md

@@ -16,6 +16,25 @@ This model is an int4 model with group_size 128 of [google/gemma-2b](https://hug
 
 
 ### Use the model
+### INT4 Inference with ITREX on CPU
+Install the latest [intel-extension-for-transformers](
+https://github.com/intel/intel-extension-for-transformers)
+```python
+from intel_extension_for_transformers.transformers import AutoModelForCausalLM
+from transformers import AutoTokenizer
+quantized_model_dir = "Intel/gemma-2b-int4-inc"
+model = AutoModelForCausalLM.from_pretrained(quantized_model_dir,
+                                             device_map="auto",
+                                             trust_remote_code=False,
+                                             use_neural_speed=False,
+                                             )
+tokenizer = AutoTokenizer.from_pretrained(quantized_model_dir, use_fast=True)
+print(tokenizer.decode(model.generate(**tokenizer("There is a girl who likes adventure,", return_tensors="pt").to(model.device),max_new_tokens=50)[0]))
+"""
+<bos>There is a girl who likes adventure, and she is a girl who likes to travel. She is a girl who likes to explore the world and see new things. She is a girl who likes to meet new people and learn about their cultures. She is a girl who likes to take risks
+"""
+```
+
 
 ### INT4 Inference with AutoGPTQ's  kernel