Cannot integrate AppImage with AppImageLauncher

### Bug description

I need AppImages to be integrated into the system so I don't have to dig through the system to run them manually, so this bug stops me from using Audacity altogether. Both the Ubuntu **20.04** AppImage and the Ubuntu **22.04** AppImage have this issue.

### Steps to reproduce

1. Make sure AppImageLauncher is installed
2. Download latest version of Audacity for Linux
3. Run the AppImage you get
4. AppImageLauncher will ask if you want to integrate it; click 'Integrate and run'

### Expected behavior

AppImageLauncher should integrate the AppImage and then run it

### Actual behavior

AppImageLauncher throws an error, 'Failed to register AppImage in system via libappimage'. AppImage file disappears and must be downloaded again.

### Audacity Version

Other

### Operating system

Linux

### Additional context

- The Audacity version I attempted to use is **3.7.3**. The Audacity Version field in the bug report form still only goes up to 3.7.2, so I decided to select 'other' for that field and mention the actual version here.
- Linux distro is Linux Mint 22.1 Cinnamon.