Change to new RPC endpoint

The frontend doesnt load the balance of the user because it still uses the old rpc endpoint. Therefore replace the old endpoint with the new one ( "https://rpc.gnosischain.com/" ) 

Error message:

Access to fetch at 'https://rpc.xdaichain.com/' from origin 'https://lock.gnosis.io' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

packages/app/config.ts

@@ -36,7 +36,7 @@ export const CHAINS: Chain[] = [
       name: "xDai",
       symbol: "xDAI",
     },
-    rpcUrls: ["https://rpc.xdaichain.com/"],
+    rpcUrls: ["https://rpc.gnosischain.com/"],
     blockExplorers: [
       { name: "Blockscout", url: "https://blockscout.com/xdai/mainnet" },
     ],