Update login.json - email

update all support emails from <whatever-support>@datacommons.io to <whatever-support>@gen3.org
do not merge until gen3.org emails are active.

config/bih/login.json

@@ -16,5 +16,5 @@
       }
     ],
     "image": "images/gene_side_texture.svg",
-    "email": "gen3@datacommons.io"
+    "email": "gen3@gen3.org"
   }