[FEATURE] Support of Macedonian

TYPO3 supports now translations from Macedonian which uses `mk` as
locale.

Resolves: #90328
Releases: master, 9.5
Change-Id: I25bec5840e48a74e23fe9d1b0d565f2cdd036f22
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63178


Tested-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>

typo3/sysext/core/Classes/Localization/Locales.php

@@ -68,6 +68,7 @@ class Locales implements SingletonInterface
         'lt' => 'Lithuanian',
         'lv' => 'Latvian',
         'mi' => 'Maori',
+        'mk' => 'Macedonian',
         'ms' => 'Malay',
         'nl' => 'Dutch',
         'no' => 'Norwegian',

typo3/sysext/core/Documentation/Changelog/9.5.x/Feature-90328-SupportOfMacedonian.rst

+.. include:: ../../Includes.txt
+
+============================================
+Feature: #90328 - Support of Macedonian (MK)
+============================================
+
+See :issue:`90328`
+
+Description
+===========
+
+TYPO3 supports now localizations into Macedonian which uses `mk` as locale.
+
+.. index:: ext:core