Update README.md with command line instruction to generate secret value which can be used in secret_variables
Update README.md with command line instruction to generate secret value which can be used in secret_variables

tomzo/gocd-yaml-config-plugin,fabiosantos-info/gocd-yaml,tomzo/gocd-yaml-config-plugin,tomzo/gocd-yaml-config-plugin,fabiosantos-info/gocd-yaml,fabiosantos-info/gocd-yaml