[staging] Fix jalali calendar javascript

[infograf768]

#28698

Summary of Changes

Adding missing return

Testing Instructions

Switch to Persian in administrator and edit/create an article Look at the calendar fields in the Publishing tab.

I personally have not remarked any differences in the calendar but code makes sense

@balvard
Would be interested in learning what is modified in the calendar display after the patch.

[Quy]

I have tested this item ✅ successfully on 3f6edf0

Code review

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[richard67]

I have tested this item ✅ successfully on 3f6edf0

Code review

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[richard67]

RTC

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[zero-24]

Merging thanks :)