Update RPCs (ethereum-lists#1006)

Update RPCs for Nova Network

Author: Nova Network Inc

_data/chains/eip155-87.json

@@ -3,8 +3,9 @@
   "chain": "NNW",
   "icon": "novanetwork",
   "rpc": [
-    "https://rpc.novanetwork.io:9070",
-    "http://nova.genyrpc.info:8545"
+    "https://connect.novanetwork.io",
+    "https://0x57.redjackstudio.com",
+    "https://rpc.novanetwork.io:9070"
   ],
   "faucets": [],
   "nativeCurrency": {