minor #11594 [Workflow] Update dumping doc (noniagriconomie)

This PR was merged into the 3.4 branch.

Discussion
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[Workflow] Update dumping doc

Hi,
Feature I learned while discussing on slack
To go as well on 4.X, as the file changes, should i create a new PR?
thank you

Commits
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25138ef Update dumping-workflows.rst

Author: javiereguiluz

workflow/dumping-workflows.rst

@@ -28,7 +28,10 @@ with the ``WorkflowDumpCommand``:
 
 .. code-block:: terminal
 
+    # Dump the workflow
     $ php bin/console workflow:dump name | dot -Tsvg -o graph.svg
+    # Dump the workflow while highlighing place1 and place2
+    $ php bin/console workflow:dump name place1 place2 | dot -Tsvg -o graph.svg
 
 .. note::