Update 0G Mainnet (16661) and 0G Galileo Testnet (16602) metadata (#8350)

Co-authored-by: ligi <ligi@ligi.de>

Author: wriches

_data/chains/eip155-16602.json

@@ -1,21 +1,26 @@
 {
-  "name": "0G-Testnet-Galileo",
-  "chain": "0G-Testnet",
+  "name": "0G Galileo Testnet",
+  "chain": "0G",
   "rpc": ["https://evmrpc-testnet.0g.ai"],
-  "faucets": ["https://faucet.0g.ai"],
+  "features": [{ "name": "EIP155" }, { "name": "EIP1559" }],
+  "faucets": [
+    "https://faucet.0g.ai",
+    "https://cloud.google.com/application/web3/faucet/0g/galileo"
+  ],
   "nativeCurrency": {
     "name": "0G",
     "symbol": "0G",
     "decimals": 18
   },
   "infoURL": "https://0g.ai",
-  "shortName": "0g-testnet-galileo",
+  "shortName": "0g-galileo-testnet",
   "chainId": 16602,
   "networkId": 16602,
+  "slip44": 1,
   "icon": "0g",
   "explorers": [
     {
-      "name": "0G BlockChain Explorer",
+      "name": "0G Chainscan",
       "url": "https://chainscan-galileo.0g.ai",
       "standard": "EIP3091"
     }

_data/chains/eip155-16661.json

@@ -2,6 +2,7 @@
   "name": "0G Mainnet",
   "chain": "0G",
   "rpc": ["https://evmrpc.0g.ai"],
+  "features": [{ "name": "EIP155" }, { "name": "EIP1559" }],
   "faucets": [],
   "nativeCurrency": {
     "name": "0G",
@@ -15,7 +16,7 @@
   "icon": "0g",
   "explorers": [
     {
-      "name": "0G BlockChain Explorer",
+      "name": "0G Chainscan",
       "url": "https://chainscan.0g.ai",
       "standard": "EIP3091"
     }