Datepicker Localization Bug: Arabic Months Short Names Displayed as Numbers

I am experiencing an issue with the jQuery datepicker when the localization is set to "ar" (Arabic). Instead of showing the short names for the months, the datepicker displays them as numbers (1, 2, 3, etc.).

Steps to Reproduce:

1. Initialize the jQuery datepicker with the following settings:
   javascript
   $('#datepicker').datepicker({
   dateFormat: 'mm/dd/yy',
   changeMonth: true,
   changeYear: true,
   regional: 'ar' // Arabic localization
   });
2. Open the datepicker.
3. Observe the month short names displayed.

Expected Behavior:
The month short names should be displayed as:

• ين (Jan)
• فب (Feb)
• مار (Mar)
• إب (Apr)
• ماي (May)
• يون (Jun)
• يول (Jul)
• أغس (Aug)
• سب (Sep)
• أكت (Oct)
• نوف (Nov)
• ديس (Dec)

Actual Behavior:
The month short names are displayed as numbers (1, 2, 3, ...).

Start by reproducing the Arabic datepicker case using the initialization and regional setting shown in the issue, then trace how the datepicker builds short month names for the ar locale. Confirm the fix by checking that the listed Arabic abbreviations appear instead of numeric values when the month selector is displayed.