update int8 onnx model and readme

Signed-off-by: dujun <jun.du@intel.com>

README.md

@@ -66,8 +66,8 @@ The original fp32 model comes from the fine-tuned model [camembert-base-mrpc](ht
 
 |   |INT8|FP32|
 |---|:---:|:---:|
-| **Accuracy (eval-f1)** |0.8847|0.8928|
-| **Model size (MB)**  |115|423|
+| **Accuracy (eval-f1)** |0.8819|0.8928|
+| **Model size (MB)**  |113|423|
 
 
 #### Load ONNX model:

model.onnx

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:e8f458d3d833494a31eb4d9ab863e1177e632f8e4ae0c7f45888c8f1cedb723f
-size 120091323
+oid sha256:94c587b043a7c4f43b0dcc2a01fbb400f093a5898541297eaa82fdfb3cbbd019
+size 118337259