minor #12942 [workflow] Added a way to not fire the announce event (lyrixx)

This PR was squashed before being merged into the master branch (closes #12942).

Discussion
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[workflow] Added a way to not fire the announce event

fixes #12941

Commits
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57ac25d [workflow] Added a way to not fire the announce event

Author: javiereguiluz

workflow.rst

@@ -334,6 +334,10 @@ order:
     * ``workflow.[workflow name].announce``
     * ``workflow.[workflow name].announce.[transition name]``
 
+    You can avoid those events by using the context::
+
+        $workflow->apply($subject, $transitionName, [Workflow::DISABLE_ANNOUNCE_EVENT => true]);
+
 .. note::
 
     The leaving and entering events are triggered even for transitions that stay