Fix: update wrong cosmos issue url (#341)

Author: cryptodev-2s

src/wallet.ts

@@ -469,7 +469,7 @@ WalletMiddlewareOptions): JsonRpcMiddleware<any, Block> {
 function validateVerifyingContract(data: string) {
   const { domain: { verifyingContract } = {} } = parseTypedMessage(data);
   // Explicit check for cosmos here has been added to address this issue
-  // https://github.com/MetaMask/eth-json-rpc-middleware/issues/new
+  // https://github.com/MetaMask/eth-json-rpc-middleware/issues/337
   if (
     verifyingContract &&
     (verifyingContract as string) !== 'cosmos' &&