desktop file does not pass desktop-file-validate

[probonopd]

The desktop file does not pass desktop-file-validate:

webrecorderplayer-electron.desktop: error: value "network;" for key "Categories" in group "Desktop Entry" contains an unregistered value "network"; values extending the format should start with "X-"

webrecorderplayer-electron.desktop: hint: value "network;" for key "Categories" in group "Desktop Entry" does not contain a registered main category; application might only show up in a "catch-all" section of the application menu

It should be Categories=Network; according to https://standards.freedesktop.org/menu-spec/latest/apa.html. Note the trailing semicolon.

Please fix the desktop file and make sure it passes desktop-file-validation`.

Again, plese ping me once a release is available for download.

Reference:
https://travis-ci.org/AppImage/appimage.github.io/builds/276191978#L691