modify build workflow dispatch job to include random password

Author: EmmanuelNwa247

.github/workflows/packMachines.yml

@@ -206,8 +206,8 @@ jobs:
 
            hashed_pass=$(mkpasswd --method=SHA-512 "$plain_pass")
 
-           sed "s|{{password_hash}}|$hashed_pass|" user-data > user-data-final
-          mv user-data-final user-data
+           sed "s|{{password_hash}}|$hashed_pass|"  ./packer/ubuntu-server/http/user-data > ./packer/ubuntu-server/http/user-data-final
+          mv ./packer/ubuntu-server/http/user-data-final ./packer/ubuntu-server/http/user-data
 
           echo "user-data file is ready with hashed password."