Update _eth_unsubscribe-request.mdx (#1886)

Author: aso20455

services/reference/arbitrum/json-rpc-methods/subscription-methods/_eth_unsubscribe-request.mdx

@@ -5,7 +5,7 @@ import TabItem from "@theme/TabItem"
   <TabItem value="WSS">
 
 ```bash
-wscat -c wss://arbitrum-mainnet.io/ws/v3/<YOUR-API-KEY> -x '{"jsonrpc": "2.0", "id": 1, "method": "eth_unsubscribe", "params": ["0x9cef478923ff08bf67fde6c64013158d"]}'
+wscat -c wss://arbitrum-mainnet.infura.io/ws/v3/<YOUR-API-KEY> -x '{"jsonrpc": "2.0", "id": 1, "method": "eth_unsubscribe", "params": ["0x9cef478923ff08bf67fde6c64013158d"]}'
 ```
 
   </TabItem>