main/postmarketos-base-ui-gnome: add snapshot to pmb_recommends (MR 5644)

main/postmarketos-base-ui-gnome/APKBUILD

 # Maintainer: Oliver Smith <ollieparanoid@postmarketos.org>
 pkgname=postmarketos-base-ui-gnome
 pkgver=4
-pkgrel=0
+pkgrel=1
 pkgdesc="Meta package for shared configuration for GNOME-based UIs"
 url="https://postmarketos.org"
 arch="noarch"
@@ -45,8 +45,9 @@ _pmb_recommends="
 	gnome-weather
 	lollypop
 	loupe
-	papers
 	nautilus
+	papers
+	snapshot
 "
 
 package() {