**What seems off**: according to the [schema](https://github.com/serverlessworkflow/specification/blob/main/schema/workflow.yaml#L392), the name of the property in [OpenAPI](https://github.com/serverlessworkflow/specification/blob/main/dsl-reference.md#openapi-call) should be "Parameters" instead of "Arguments" **What you expected to be**: Change to "Parameters" instead of "Arguments" 
