Currently, the broker URL is hard coded in the workflow.
We shall find a way to make it configurable, a possible way would be to use standard event production (ie: https://github.com/serverlessworkflow/specification/blob/0.8.x/specification.md#producedevent-definition)

Then, the charts shall be updated to set the brokerURL in the values.yaml file to be used by the workflow and the knative function