Missing Desktop entries in docs

I have found the list of desktop entries introduced for AppImage purposes, and I think this list is not full.

I have integrated some packages using libappimage and in created desktop entry are entries not listed in docs:

```desktop
[Desktop Entry]
Name=Auryo (2.5.4.503)
Exec=/home/pawel/Downloads/Auryo-2.5.4.AppImage
Terminal=false
Type=Application
Icon=appimagekit_28f0b030a2d65b08dddd1e5b5b60587e_auryo
StartupWMClass=Auryo
X-AppImage-Version=2.5.4.503
Comment=Listen to SoundCloud\u00ae from the comfort of your desktop. Use keyboard shortcuts to navigate through your music. Be more productive.
MimeType=x-scheme-handler/auryo;
Categories=Audio;
TryExec=/home/pawel/Downloads/Auryo-2.5.4.AppImage
X-AppImage-Old-Icon=auryo
X-AppImage-Old-Name=Auryo
X-AppImage-Identifier=28f0b030a2d65b08dddd1e5b5b60587e
```