Pashto is an RTL language

Fixes #11428

CHANGELOG.md

@@ -16,6 +16,7 @@
 - Fixed a bug where filtering an element query by a relational field using `:empty:`/`:notempty:` wasn’t factoring in the source elements’ site IDs, for fields set to manage relations on a per-site basis. ([#11418](https://github.com/craftcms/cms/issues/11418))
 - Fixed a bug where the Temporary Uploads asset source wasn’t including subfolders.
 - Fixed a bug where file upload progress bars weren’t always going away when an upload error occurred.
+- Fixed a bug where Pashto was not being treated as an RTL langauge. ([#11428](https://github.com/craftcms/cms/issues/11428))
 
 ### Security
 - Environment-aware control panel fields no longer suggest environment variables that begin with `HTTP_`.

src/i18n/Locale.php

@@ -229,6 +229,7 @@ class Locale extends BaseObject
         'ar',
         'fa',
         'he',
+        'ps',
         'ur',
     ];