Update omni chain details (#7755)

Co-authored-by: Frederik Bolding <[email protected]>

Author: ga-reth

_data/chains/eip155-166.json

@@ -1,24 +1,24 @@
 {
-  "name": "Omni",
-  "chain": "Omni",
+  "name": "Nomina",
+  "chain": "Nomina",
   "status": "active",
-  "rpc": ["https://mainnet.omni.network", "wss://wss.mainnet.omni.network"],
+  "rpc": ["https://mainnet.nomina.io", "wss://wss.mainnet.nomina.io"],
   "features": [{ "name": "EIP155" }],
   "faucets": [],
   "nativeCurrency": {
-    "name": "Omni",
-    "symbol": "OMNI",
+    "name": "Nomina",
+    "symbol": "NOM",
     "decimals": 18
   },
   "infoURL": "https://docs.omni.network",
-  "shortName": "omni",
+  "shortName": "nom",
   "chainId": 166,
   "networkId": 166,
   "slip44": 1,
-  "icon": "omni",
+  "icon": "nom",
   "explorers": [
     {
-      "name": "Omni EVM and cross-chain Explorer",
+      "name": "Nomina EVM and cross-chain Explorer",
       "url": "https://omniscan.network",
       "standard": "EIP3091"
     }

_data/icons/nom.json

@@ -0,0 +1,8 @@
+[
+  {
+    "url": "ipfs://QmVfJBGe7JpKJhG8hrSMU42RxhCSQ3ga3NSArA9vEFqF4C",
+    "width": 512,
+    "height": 512,
+    "format": "png"
+  }
+]