Fix type in github

Author: LP1012

_data/people.yml

@@ -119,7 +119,7 @@
       icon: envelope-o
       name: Email
     - url: https://https://github.com/LP1012
-      icon: githuib-alt
+      icon: github-alt
       name: Github
     - url: http://https://https://scholar.google.com/citations?hl=en&user=lbIbZsQAAAAJ
       icon: graduation-cap