Update production-node.md

Mentioning availability of the latest Cardona version v0.5.6

Author: EmpieichO

docs/zkEVM/get-started/setup-nodes/production-node.md

@@ -75,7 +75,7 @@ Let's start setting up our zkNode:
 
 2. Download and extract the artifacts. Note that you may need to [install unzip](https://formulae.brew.sh/formula/unzip) before running this command. Also, unlike the mainnet and the Goerli testnet that use the latest version, Cardona testnet uses a specific version.
 
-   So use the next `curl` command specifically for Cardona:
+   So use the next `curl` command specifically for Cardona, which uses version 0.5.5 (Note that the latest version, Cardona v0.5.6, is available and can equally be used.):
 
    ```bash
     curl -L https://github.com/0xPolygonHermez/zkevm-node/releases/download/v0.5.5/$ZKEVM_NET.zip > $ZKEVM_NET.zip && unzip -o $ZKEVM_NET.zip -d $ZKEVM_DIR && rm $ZKEVM_NET.zip