Update spacing

Author: joaniekube

services/reference/starknet/json-rpc-methods/starknet_pendingtransactions.mdx

@@ -30,7 +30,7 @@ Replace `YOUR-API-KEY` with an API key from your [Infura dashboard](https://infu
 curl https://starknet-mainnet.infura.io/v3/6e46ee5c0df54fb48c0fb2a94502c42a \
   -X POST \
   -H "Content-Type: application/json" \
-  -d '{"jsonrpc":"2.0","method":"starknet_pendingTransactions", "params":[], "id":0}'
+  -d '{"jsonrpc": "2.0", "method": "starknet_pendingTransactions", "params": [], "id": 0}'
 ```
 
 </TabItem>