minor #9233 hotfix: missing the call to InstanceOfSupportStrategy (Simperfit, javiereguiluz)

This PR was merged into the master branch.

Discussion
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hotfix: missing the call to InstanceOfSupportStrategy

Updating the exemple I missed the call to instanceOfSupportStrategy which is now needed.

Commits
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fbcf572 Added the use import
379a939 hotfix: missing the call to InstanceOfSupportStrategy

Author: javiereguiluz

components/workflow.rst

@@ -63,15 +63,16 @@ A registry will also help you to decide if a workflow supports the object you
 are trying to use it with::
 
     use Symfony\Component\Workflow\Registry;
+    use Symfony\Component\Workflow\WorkflowInterface\InstanceOfSupportStrategy;
     use Acme\Entity\BlogPost;
     use Acme\Entity\Newsletter;
 
     $blogWorkflow = ...
     $newsletterWorkflow = ...
 
     $registry = new Registry();
-    $registry->addWorkflow($blogWorkflow, BlogPost::class);
-    $registry->addWorkflow($newsletterWorkflow, Newsletter::class);
+    $registry->addWorkflow($blogWorkflow, new InstanceOfSupportStrategy(BlogPost::class));
+    $registry->addWorkflow($newsletterWorkflow, new InstanceOfSupportStrategy(Newsletter::class));
     
 .. versionadded:: 4.1
     The ``addWorkflow()`` method was introduced in Symfony 4.1. In previous