refactor: extend i18n files with new translations

src/assets/i18n/de.json

@@ -58,7 +58,8 @@
                 "USER_AGENT": "User agent",
                 "SAVE": "Speichern",
                 "ORIGINAL_FILENAME": "Original-Dateinamen"
-            }
+            },
+            "UPDATED": "Aktualisiert am"
         },
         "TABS": {
             "FILE_UPLOAD": "Aus Dateisystem hochladen",

src/assets/i18n/en.json

@@ -26,7 +26,8 @@
                 "SAVE": "Save",
                 "USER_AGENT": "User agent",
                 "ORIGINAL_FILENAME": "Original filename"
-            }
+            },
+            "UPDATED": "Updated"
         },
         "FILE_UPLOAD": {
             "DRAG_DROP": "Drag & drop files here",

src/assets/i18n/ru.json

@@ -26,7 +26,8 @@
                 "SAVE": "Сохранить",
                 "USER_AGENT": "User agent",
                 "ORIGINAL_FILENAME": "Имя файла при загрузке"
-            }
+            },
+            "UPDATED": "Обновлен"
         },
         "FILE_UPLOAD": {
             "DRAG_DROP": "Перетащите файл в эту область",