main/postmarketos-base-ui-gnome: add fprintd to depends (MR 6206)

So fingerprint support is shipped by default if supported by the
hardware.

[ci:skip-build]: already built successfully in CI

main/postmarketos-base-ui-gnome/APKBUILD

 # Maintainer: Oliver Smith <ollieparanoid@postmarketos.org>
 pkgname=postmarketos-base-ui-gnome
 pkgver=4
-pkgrel=6
+pkgrel=7
 pkgdesc="Meta package for shared configuration for GNOME-based UIs"
 url="https://postmarketos.org"
 arch="noarch"
 license="GPL-3.0-or-later"
 depends="
 	dnsmasq
+	fprintd
 	gcr-ssh-agent
 	gnome-bluetooth
 	gnome-keyring