Add github email

Author: hjunyoung

_config.yml

@@ -138,7 +138,7 @@ author:
       # url: "https://facebook.com/"
     - label: 'GitHub'
       icon: 'fab fa-fw fa-github'
-      # url: "https://github.com/hjunyoung"
+      url: "https://github.com/hjunyoung"
     - label: 'Instagram'
       icon: 'fab fa-fw fa-instagram'
       # url: "https://instagram.com/"