minor #18801 [Workflow] Deprecate GuardEvent::getContext() method (alexandre-daubois)

This PR was merged into the 6.4 branch.

Discussion
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[Workflow] Deprecate `GuardEvent::getContext()` method

Fix #18799

Commits
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1a44477 [Workflow] Deprecate `GuardEvent::getContext()` method

Author: javiereguiluz

workflow.rst

@@ -466,6 +466,12 @@ The context is accessible in all events except for the ``workflow.guard`` events
     // in an event listener (workflow.guard events)
     $context = $event->getContext(); // returns ['context']
 
+.. deprecated:: 6.4
+
+    Gathering events context is deprecated since Symfony 6.4 and the
+    :method:`Symfony\\Component\\Workflow\\Event::getContext` method will be
+    removed in Symfony 7.0.
+
 .. note::
 
     The leaving and entering events are triggered even for transitions that stay