chore(examples): fix ipfs-kad example usage

Fixes the usage instruction for `ipfs-kad` example.

Pull-Request: #5953.

Author: kamuik16

examples/ipfs-kad/README.md

@@ -20,7 +20,7 @@ By specifying a peer ID as a parameter, the code will search for the closest pee
 Run the example code:
 
 ```sh
-cargo run -- get-peers [PEER_ID]
+cargo run -- get-peers --peer-id [PEER_ID]
 ```
 
 Replace `[PEER_ID]` with the base58-encoded peer ID you want to search for.