Add newline to en.json

src-main/l10n/en.json

@@ -471,4 +471,4 @@
     "string": "Use the file pickers in the app instead of drag and drop, or run the following command in a terminal and restart the app to grant access:",
     "developer_comment": "Part of window that appears when user tries to drag & drop a file that the app can't access. Followed by a terminal command."
   }
-}
+}