Desktop: Update Electron to 25.9.0

[personalizedrefrigerator]

Summary

Fixes at least one security issue (see the Electron release notes).

Testing

• Linux (Ubuntu 23.04)

  • Launches
  • Can open external editor
  • Can edit with rich text editor
  • Changes light/dark theme to match system
  • Plugins can display dialogs and add markdown renderer content scripts (tested with js-draw)
  • PDF viewer
    • Shows PDF content
    • Print button shows a print dialog

• Windows 11

  • Launches
  • Installs
  • Sync works (Joplin Server)
  • Can open external editor
  • Can edit with rich text editor
  • Changes light/dark theme to match system
  • Plugins can display dialogs and add markdown renderer content scripts (tested with js-draw)
  • PDF viewer
    • Shows PDF content
    • Print button shows a print dialog

Note:
The second time I launched JoplinPortable on Windows, after installing the Freehand Drawing and RevealJS Integration plugins, an error dialog was shown that referenced ffmpeg. The app still launched and subsequent restarts haven't shown the message.

• MacOS
  • Launches
  • Sync works (OneDrive)
  • Can open external editor
  • Can edit with rich text editor
  • Changes light/dark theme to match system
  • Plugins can display dialogs and add markdown renderer content scripts (tested with js-draw)
  • PDF viewer
    • Shows PDF content
    • Print button shows a print dialog

[laurent22]

Thanks for the update!