update int8 onnx model and readme

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

README.md

@@ -63,12 +63,14 @@ This is an INT8 ONNX model quantized with [Intel® Neural Compressor](https://gi
 
 The original fp32 model comes from the fine-tuned model [Alireza1044/albert-base-v2-sst2](https://huggingface.co/Alireza1044/albert-base-v2-sst2).
 
+The calibration dataloader is the eval dataloader. The calibration sampling size is 100.
+
 #### Test result
 
 |   |INT8|FP32|
 |---|:---:|:---:|
-| **Accuracy (eval-accuracy)** |0.9186|0.9232|
-| **Model size (MB)**  |89|45|
+| **Accuracy (eval-accuracy)** |0.9140|0.9232|
+| **Model size (MB)**  |50|45|
 
 
 #### Load ONNX model:

model.onnx

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:df3f220d199dd52af87203ab564efe7584c6fd514fef93d1d5b3772c47c14145
-size 92596546
+oid sha256:64266db101b17dc05cb4fd7b0643d7eda5425f02494feca37c38b2153b3d10fc
+size 51754627