chainlist update

reference-rpc-endpoint.json

@@ -11,5 +11,17 @@
     "real": {
 	"id": 111188,
 	"urls": ["https://rpc.realforreal.gelato.digital"]
+    },
+    "arbitrum": {
+	"id": 42161,
+	"urls": ["https://1rpc.io/arb"]
+    },
+    "arbitrum": {
+	"id": 42161,
+	"urls": ["https://arb1.arbitrum.io/rpc"]
+    },
+    "arbitrum-nova": {
+	"id": 42170,
+	"urls": ["https://nova.arbitrum.io/rpc"]
     }
 }