Update WorkflowRunner.md

Author: sawenzel

MC/doc/WorkflowRunner.md

@@ -79,6 +79,12 @@ Further keys in this format are:
 
 A workflow is generated by different tools. A current example following the PWGHF embedding exercise can be found here https://github.com/AliceO2Group/O2DPG/blob/master/MC/run/PWGHF/create_embedding_workflow.py
 
+# Workflow example:
+
+A workflow doing a common background simulation, followed by 2 timeframes of signal MC, digitization, reconstruction and AOD might look like this graphically:
+
+![workflowgraph](./workflow.gv.png)
+
 ## Example usage
 
 Run workflow in a given file