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

92% 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

@@ -6,7 +6,7 @@
     "continue": "Продолжить",
     "copy": "Копировать",
     "copyFile": "Скопировать файл",
-    "copyToClipboard": "Скопировать ссылку в буфер",
+    "copyToClipboard": "Скопировать в буфер",
     "copyDownloadLinkToClipboard": "Copy download link to clipboard",
     "create": "Создать",
     "delete": "Удалить",