[bot] Update contributors.json

Author: MichaelTamaki

contributors.json

@@ -150,6 +150,11 @@
         "avatar_url": "https://avatars.githubusercontent.com/u/77118878?v=4",
         "url": "https://github.com/DerekMalone"
       },
+      {
+        "username": "Hooobot",
+        "avatar_url": "https://avatars.githubusercontent.com/u/73650949?v=4",
+        "url": "https://github.com/Hooobot"
+      },
       {
         "username": "tyliec",
         "avatar_url": "https://avatars.githubusercontent.com/u/15609358?v=4",