Validate workflow definition yaml.
Example
query workflowDefinitionValidation {  actor {    account(id: 11933347) {      workflowAutomation {        workflowDefinitionValidation(          definition: {            yaml: "ICAgICAgICAgICAgICAgIG5hbWU6IG15V29ya2Zsb3cKCiAgICAgICAgICAgICAgICBzdGVwczoKICAgICAgICAgICAgICAgICAgLSBuYW1lOiBvbmx5U3RlcAogICAgICAgICAgICAgICAgICAgIHR5cGU6IHdhaXQKICAgICAgICAgICAgICAgICAgICBzZWNvbmRzOiAtNDIKCiAgICAgICAgICAgICAgICAgIC0gbmFtZTogJycKICAgICAgICAgICAgICAgICAgICB0eXBlOiB3YWl0CiAgICAgICAgICAgICAgICAgICAgc2Vjb25kczogLTQyCgogICAgICAgICAgICAgICAgICAtIG5hbWU6IG9ubHlTdGVwCiAgICAgICAgICAgICAgICAgICAgdHlwZTogYWN0aW9uCiAgICAgICAgICAgICAgICAgICAgYWN0aW9uOiBDb25zb2xlTG9nCiAgICAgICAgICAgICAgICAgICAgdmVyc2lvbjogIiIKICAgICAgICAgICAgICAgICAgICBpbnB1dHM6CiAgICAgICAgICAgICAgICAgICAgICAgZm9vOiAiIg=="          }        ) {          errors {            message          }          valid        }      }    }  }}