i18n: translation updates from weblate

Co-authored-by: Aliaksandr Truš <evils.mail@gmail.com>
Co-authored-by: Fedorov Alexei <aleksejfedorov963@gmail.com>
Co-authored-by: Feike Donia <feikedonia@proton.me>
Co-authored-by: Hosted Weblate <hosted@weblate.org>
Co-authored-by: Quentin PAGÈS <quentinantonin@free.fr>
Co-authored-by: Yauhen <bugomol@users.noreply.hosted.weblate.org>
Co-authored-by: jickson john <jickson.john@gmail.com>
Co-authored-by: jonnysemon <jonnysemon@users.noreply.hosted.weblate.org>
Translate-URL: https://hosted.weblate.org/projects/pop-os/cosmic-greeter/ar/
Translate-URL: https://hosted.weblate.org/projects/pop-os/cosmic-greeter/be/
Translate-URL: https://hosted.weblate.org/projects/pop-os/cosmic-greeter/nl/
Translate-URL: https://hosted.weblate.org/projects/pop-os/cosmic-greeter/ru/
Translation: Pop OS/COSMIC Greeter

i18n/ar/cosmic_greeter.ftl

@@ -1,4 +1,4 @@
-accessibility = إمكانية الوصول
+accessibility = الإتاحة
     .screen-reader = قارئ الشاشة
     .magnifier = المكبر
     .high-contrast = تباين عالٍ
@@ -27,3 +27,4 @@ shutdown-timeout =
     }
 suspend = علِّق
 user = المستخدم
+authenticating = يستوثّق...