Update Japanese translation (#802)

src/_locales/ja/messages.yml

@@ -28,7 +28,7 @@ buttonEdit:
   message: 編集
 buttonEmptyRecycleBin:
   description: Button to empty the recycle bin.
-  message: ''
+  message: 今すぐゴミ箱を空にする
 buttonEnable:
   description: Button to enable a script.
   message: 有効化