feat: Translate frontend/src/i18n/en.json in ru

96% of minimum 50% translated source file: 'frontend/src/i18n/en.json'
on 'ru'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

frontend/src/i18n/ru.json

@@ -141,7 +141,7 @@
     "uploadMessage": "Выберите вариант для загрузки.",
     "optionalPassword": "Необязательный пароль",
     "resolution": "Разрешение",
-    "discardEditorChanges": "Are you sure you wish to discard the changes you've made?"
+    "discardEditorChanges": "Вы действительно желаете отменить ваши правки?"
   },
   "search": {
     "images": "Изображения",