In RTL languages checked checklist items move to the right

When checking a checklist item in rtl languages the item moves to the left:
https://imgur.com/a/WNO1yAi

### Expected
Should be right-aligned

### Observed
It is right-aligned

Reproduce the checklist behavior in an RTL language using the linked screenshot as the reference, then trace the checklist rendering and its RTL layout styles. Confirm the intended alignment against the contradictory Expected and Observed sections; done means checked items remain right-aligned in RTL without changing their unchecked behavior.

Written by the indexing model from the issue text.