minor #7765 typo fix (kevindh89)

This PR was merged into the 3.2 branch.

Discussion
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typo fix

Commits
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ce30c71 typo fix

Author: xabbuh

workflow.rst

@@ -23,7 +23,7 @@ differences and specific features of state machine in :doc:`/workflow/state-mach
 Examples
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-The simples workflow looks like this. It contains two places and one transition.
+The simplest workflow looks like this. It contains two places and one transition.
 
 .. image:: /_images/components/workflow/simple.png