modify the changelog

Author: OwenLiuzZ

CHANGELOG.md

@@ -88,6 +88,7 @@ To release a new version, please update the changelog as followed:
   - `tutorial_models_vgg16` and `tutorial_models_vgg19` has been changed the input scale from [0,255] to [0,1](PR #710)
   - `tutorial_mnist_distributed_trainer.py` and `tutorial_cifar10_distributed_trainer.py` are added to explain the uses of Distributed Trainer (PR #700)
   - add `tutorial_quanconv_cifar10.py` and `tutorial_quanconv_mnist.py` (PR #735)
+  - add `tutorial_work_with_onnx.py`(PR #775)
 ### Changed
   - function minibatches changed to avoid wasting samples.(PR #762)
   - all the input scale in both vgg16 and vgg19 has been changed the input scale from [0,255] to [0,1](PR #710)