move all gtk docs into -doc subpackages

community/libsignon-glib/APKBUILD

@@ -10,7 +10,7 @@ arch="all"
 license="LGPL-2.1-only"
 makedepends="meson glib-dev check-dev gobject-introspection-dev vala py3-gobject3 gtk-doc"
 checkdepends="dbus-test-runner signond"
-subpackages="$pkgname-dev"
+subpackages="$pkgname-dev $pkgname-doc"
 source="https://gitlab.com/accounts-sso/libsignon-glib/-/archive/$pkgver/libsignon-glib-$pkgver.tar.gz
 	https://gitlab.com/accounts-sso/signon-dbus-specification/-/archive/$_spec_commit/signon-dbus-specification-$_spec_commit.tar.gz
 	"