[5.1] Workflows missing strings

[brianteeman]

AFAICT these strings have been missing since the beginning. They are used in

administrator/components\com_workflow\src\Controller\StagesController.php administrator/components\com_workflow\src\Controller\TransitionController.php administrator/components\com_workflow\src\Controller\WorkflowsController.php

This has been made against 5.1 as they are new strings

Testing Instructions

code review should be fine

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[Quy]

I have tested this item ✅ successfully on 0d632fc

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[viocassel]

I have tested this item ✅ successfully on 0d632fc

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42390.}

[Quy]

RTC

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[Razzo1987]

Thank you!