minor #15126 [Workflow] Update workflow.rst (noniagriconomie)

This PR was merged into the 4.4 branch.

Discussion
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[Workflow] Update workflow.rst

Fixes #14637
I do not know if I should also write in the code exemple, feel free to comment related to ⬇️

```php
        // this injects the blog_publishing "workflow" configured before
        // if blog_publishing is of type "state_machine", consider
        // injecting WorkflowInterface $blogPublishingStateMachine
        public function __construct(WorkflowInterface $blogPublishingWorkflow)
        {
            $this->blogPublishingWorkflow = $blogPublishingWorkflow;
        }

```

Commits
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07dea78 Update workflow.rst

Author: javiereguiluz

workflow.rst

@@ -238,7 +238,8 @@ Accessing the Workflow in a Class
 
 You can use the workflow inside a class by using
 :doc:`service autowiring </service_container/autowiring>` and using
-``camelCased workflow name + Workflow`` as parameter name::
+``camelCased workflow name + Workflow`` as parameter name. If it is a state machine type
+you can use ``camelCased workflow name + StateMachine``::
 
     use App\Entity\BlogPost;
     use Symfony\Component\Workflow\WorkflowInterface;