[docs] badge update

Author: tswsxk

README.md

@@ -1,7 +1,7 @@
 # EduCDM
 [![PyPI](https://img.shields.io/pypi/v/EduCDM.svg)](https://pypi.python.org/pypi/EduCDM)
-[![Build Status](https://www.travis-ci.org/bigdata/EduCDM.svg?branch=master)](https://www.travis-ci.org/bigdata/EduCDM)
-[![codecov](https://codecov.io/gh/bigdata/EduCDM/branch/master/graph/badge.svg)](https://codecov.io/gh/bigdata/EduCDM)
+[![Build Status](https://www.travis-ci.org/bigdata-ustc/EduCDM.svg?branch=main)](https://www.travis-ci.org/bigdata-ustc/EduCDM)
+[![codecov](https://codecov.io/gh/bigdata-ustc/EduCDM/branch/main/graph/badge.svg?token=B7gscOGQLD)](https://codecov.io/gh/bigdata-ustc/EduCDM)
 [![Download](https://img.shields.io/pypi/dm/EduCDM.svg?style=flat)](https://pypi.python.org/pypi/EduCDM)
 
 The Model Zoo of Cognitive Diagnosis Models