Fix update dialog

[Mariaboni]

Hello!! I updated the update dialog according to what we discussed on this issue last week: #3534

Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[flavioislima]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[Mariaboni]

I have read the CLA Document and I hereby sign the CLA

[flavioislima]

Looks good. Thanks for this contribution! :)

[arielj]

One thing that could improve the UX is to re-open the same dialog if the user clicked the Changelog button.

Because I imagine this scenario:

• you see the dialog
• click Changelog
• dialog closes and Changelog is displayed
• you have no way to trigger the update cause the dialog is gone

if we extract the whole function we can do something like:

autoUpdater.on('update-available', showAutoupdateDialog)

and then that function can call itself when the dialog is closed with the Changelog button

  if (response === 2) {
    shell.openExternal(
      'https://github.com/Heroic-Games-Launcher/HeroicGamesLauncher/releases'
    )
    showAutoupdateDialog()
  }

the dialog will be closed but will open again automatically I'm guessing

[flavioislima]

Closing this one in favor of #3598 that includes your comments @arielj