community/gtk4.0: upgrade to 4.16.13

https://download.gnome.org/sources/gtk/4.16/gtk-4.16.13.news

community/gtk4.0/APKBUILD

 # Contributor: Rasmus Thomsen <oss@cogitri.dev>
 # Maintainer: team/gnome <pabloyoyoista@postmarketos.org>
 pkgname=gtk4.0
-pkgver=4.16.12
+pkgver=4.16.13
 pkgrel=0
 pkgdesc="The GTK Toolkit (v4)"
 url="https://www.gtk.org/"
@@ -121,5 +121,5 @@ lang() {
 }
 
 sha512sums="
-ca6deabe0447524ef021ddf367e28a40f7571d1efcd11890dc54e20d944a4c6173c6c98da6a5902ddd8b393369f9f5e843deda667b7333916ac103daf2e283d1  gtk-4.16.12.tar.xz
+6a220b716b0fdaa9c59d28e4923388f22a84bc4de5693555e5e78af7bcf2835768d6c92dea18dbc3905681d5936761dd402c6e51016ea4c4f23ab5512894f1d8  gtk-4.16.13.tar.xz
 "