Add rpcfree.com public RPC for Arbitrum One

Author: spy0n

_data/chains/eip155-42161.json

@@ -14,7 +14,8 @@
     "https://arb-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}",
     "https://arb1.arbitrum.io/rpc",
     "https://arbitrum-one-rpc.publicnode.com",
-    "wss://arbitrum-one-rpc.publicnode.com"
+    "wss://arbitrum-one-rpc.publicnode.com",
+    "https://rpcfree.com/arbitrum-rpc"
   ],
   "faucets": [],
   "explorers": [