[#12146] fix typos

Author: xabbuh

components/workflow.rst

@@ -79,11 +79,10 @@ Usage
 -----
 
 When you have configured a ``Registry`` with your workflows,
-you can retreive a workflow from it and use it as follows::
+you can retrieve a workflow from it and use it as follows::
 
     // ...
     // Consider that $blogPost is in place "draft" by default
-    // Consider that $post is in state "draft" by default
     $blogPost = new BlogPost();
     $workflow = $registry->get($blogPost);