/usr/share/appdata is deprecated

I’m getting this warning from Gentoo Quality Assurance when unpacking and installing .deb archive:

 * This package seems to install metainfo files into the following
 * location(s):
 *   /usr/share/appdata
 * This location is deprecated, it should not be used anymore by new software.
 * Appdata/Metainfo files should be installed into /usr/share/metainfo directory.
 * For more details, please see the freedesktop Upstream Metadata guidelines at
 * https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html

Could you update this?