Update _config.yml

Author: YWolfeee

_config.yml

@@ -82,7 +82,7 @@ analytics:
 author:
   name             : "Haotian Ye (叶皓天)"
   avatar           : "sf-small.jpg"
-  bio              : "Ph.D. student at [Stanford CS](https://www.cs.stanford.edu/)"
+  bio              : "CS Ph.D. student at Stanford"
   location         : "Stanford"
   email            : "haotianye@stanford.edu"
   github           : "YWolfeee"