minor symfony#10653 [Workflow] Update image to reflect given state machine configuration (dompie)

This PR was merged into the 3.4 branch.

Discussion
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[Workflow] Update image to reflect given state machine configuration

The image on the workflow's state machine page is different from the given example configuration shown below.

See https://symfony.com/doc/current/workflow/state-machines.html (and older versions).

Commits
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e4c6eea Update image to reflect given state machine example configuration

Author: xabbuh