Update address.json (#138)

Address reported by a user. Ticket 3306.

User was using Trustwallet, which had some issues. He reached out to them on Twitter and got phished by an impersonator who got access to their seed phrase and emptied their wallet. This is the direct transaction from the user's wallet, as reported by them:
https://polkadot.subscan.io/extrinsic/0x8798dfd61aea0913c123b4ed87cd2b470b0c8eabcf12374e6590aaf7759afe9d

address.json

@@ -91,5 +91,8 @@
     "1461Dsvr9GmkRjUkdJcYGP6HFygwQeZcspc6W5QgJVAT59yt",
     "14gWkqi6J3U4mcRTCi7yy824S2GepSNqpM4xNjLTCzGQpCst",
     "1X3M7sGA1Nbgd8Qh45uqdQMPNFXSHbWnvPp6CkQ9Ttp46dQ"
+  ],
+  "twitter.com":[
+    "15MGfKyXwLuuBndsiz25CJXjzR7Xp4SwTXkYJR2nNY5MGrPE"
   ]
 }