minor symfony#10738 Fixing incorrect namespace in registry part (tentacode)

This PR was submitted for the 4.2 branch but it was merged into the 4.1 branch instead (closes symfony#10738).

Discussion
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Fixing incorrect namespace in registry part

The namespace `Symfony\Component\Workflow\WorkflowInterface\InstanceOfSupportStrategy` in the workflow doc (for working on registry) is incorrect, changed to the correct namespace.

Commits
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c573365 Fixing incorrect namespace in registry part

Author: javiereguiluz

components/workflow.rst

@@ -64,7 +64,7 @@ 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 Symfony\Component\Workflow\SupportStrategy\InstanceOfSupportStrategy;
     use Acme\Entity\BlogPost;
     use Acme\Entity\Newsletter;