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