minor #18058 [Workflow] Update workflow.rst (Mick3DIY)

This PR was submitted for the 6.2 branch but it was squashed and merged into the 5.4 branch instead.

Discussion
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[Workflow] Update workflow.rst

Add Tip for using constants in YAML files to define a large workflow and use these constants everywhere ! :) Cheers to the team <3

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Commits
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4b1c9cb [Workflow] Update workflow.rst

Author: javiereguiluz

workflow.rst

@@ -160,6 +160,10 @@ follows:
     If you are creating your first workflows, consider using the ``workflow:dump``
     command to :doc:`debug the workflow contents </workflow/dumping-workflows>`.
 
+.. tip::
+
+    You can use constants in YAML files and add some in the BlogPost entity for places ``draft`` by ``!php/const App\Entity\BlogPost::STATE_DRAFT`` or for transitions ``to_review`` by ``!php/const App\Entity\BlogPost::TRANSITION_TO_REVIEW``.
+
 The configured property will be used via its implemented getter/setter methods by the marking store::
 
     // src/Entity/BlogPost.php