chore(target_chains/ethereum): update deploy.sh

Author: ali-behjati

target_chains/ethereum/contracts/deploy.sh

@@ -1,16 +1,19 @@
 #!/bin/bash
 #
 # This script deploys changes to given networks. Usage:
-# $ ./deploy.sh <network_a> <network_a> <...>
-# Network names are defined in `truffle-config.js`.
+# $ ./deploy.sh <version:vX.Y.Z|latest> <network_a> <network_a> <...>
+#
+# You need to set the PK environment variable to your private key.
 #
 # Example: Deploying to some testnet networks
-# $ ./deploy.sh bnb_testnet fantom_testnet mumbai
+# $ ./deploy.sh latest bnb_testnet fantom_testnet mumbai
 #
 # Example: Deploying to some mainnet networks
-# $ ./deploy.sh ethereum bnb avalanche
+# $ ./deploy.sh v1.4.5 ethereum bnb avalanche
 set -euo pipefail
 
+PK=$PK
+
 echo "=========== Building dependencies ==========="
 
 # This command also compiles the contracts if latest version is used