Changed return type of WorkflowControllerTrait::getWorkflow for WorkflowInterface

[KevinEcotree]

With Symfony 6.4, I get this error:
Yokai\SonataWorkflow\Controller\WorkflowController::getWorkflow(): Return value must be of type Symfony\Component\Workflow\Workflow, Symfony\Component\Workflow\Debug\TraceableWorkflow returned

Changing the return value to WorkflowInterface corrects the problem.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e6b9fb4) 89.55% compared to head (1135a49) 89.55%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #37   +/-   ##
=========================================
  Coverage     89.55%   89.55%           
  Complexity       45       45           
=========================================
  Files             2        2           
  Lines           201      201           
=========================================
  Hits            180      180           
  Misses           21       21           

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[yann-eugone]

Hi 🙂

I thought it was a duplicate of #36, but it seems that we just forgot another place where return type should be changed.
So, thanks for this PR