Fix email format in emmanuel.json

Corrected email formatting in emmanuel.json.

domains/emmanuel.json

@@ -1,9 +1,10 @@
 {
     "owner": {
         "username": "normious",
-        "email": "[emmanueljin101@gmail.com]"
+        "email": "emmanueljin101@gmail.com"
     },
     "records": {
         "A": ["216.198.79.1"]
     }
-}
+
+}