Update all.json (#247)

Added polkagiveaway[.]com. Site is currently down but a user fell for it.

Also, oxy[.]dev which is copycat of a W3F grant recipient. The original project is oxydev.ir

all.json

@@ -30,6 +30,7 @@
     "kusama.fund",
     "musk-in.com",
     "mynodeswallet.online",
+    "oxy.dev",
     "p0lkadot.network",
     "polkabeam.org",
     "polkadex.whitelist-network.com",
@@ -87,6 +88,7 @@
     "polkadotsnetwork.com",
     "polkadotunlockwallet.com",
     "polkadotwallet-unlock.org",
+    "polkagiveaway.com",
     "polkamon.co",
     "polkamon.whitelist-network.com",
     "polkapool.live",