Update all.json (#381)

Added ethx2xxevent[.]com, getxx2xbtcxx[.]com, giveaway2x[.]live (offline)

They are not doing DOT giveaways but they are promoting them in scam Polkadot digit channels

all.json

@@ -780,6 +780,9 @@
     "wpolkadot.network",
     "wwwpolkadot.js.org",
     "xn--polkadot-q86nz68f.js.org",
-    "xn--wlletconnect-cbb.com"
+    "xn--wlletconnect-cbb.com",
+    "giveaway2x.live",
+    "getxx2xbtcxx.com",
+    "ethx2xxevent.com"
   ]
 }