Release v2.4.1-beta

What's changed

• Stage updates to persist across app restarts and manage removal of updates when no longer available (8e8b0a0)
• Replace get more apps source of “https://appimage.github.io/ “ to “https://portable-linux-apps.github.io//apps.html”. Remove “https://www.appimagehub.com/“ as well. Not reliable sources. (1720166)
• Refactor prune_pending_keys to handle staged updates and improve update button state management (55b112e)
• Revert back update info field from insensitive to normal when zsync update was found. User still should be able to customize update link (4cce0c9)
• Implement sponsor dialog with QR code donation Buy-me-a-coffee, github sponsor and contributors link (700b643)

Full Changelog: v2.4.0-beta...v2.4.1-beta