main/postmarketos-artwork: set v25.12 wallpaper

This time "Sward" by Dikasp won[1].

 [1]: https://social.treehouse.systems/@postmarketOS/115640026538543141

Signed-off-by: Stefan Hansson <newbyte@postmarketos.org>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7502>

main/postmarketos-artwork/APKBUILD

@@ -1,6 +1,6 @@
 # Maintainer: Oliver Smith <ollieparanoid@postmarketos.org>
 pkgname=postmarketos-artwork
-pkgver=25.06
+pkgver=25.12
 pkgrel=0
 pkgdesc="Meta package for the postmarketOS artwork"
 url="https://postmarketos.org/"
@@ -47,13 +47,13 @@ wallpapers() {
 	#     - postmarketos-gnome.xml
 	#     - 10_pmOS-wallpaper.gschema.override
 	for i in contents metadata.json; do
-		cp -r "$builddir"/wallpapers/2024/evergreen/"$i" \
+		cp -r "$builddir"/wallpapers/2024/sward/"$i" \
 			"$subpkgdir"/usr/share/wallpapers/postmarketos/"$i"
 	done
 
 	# /usr/share/wallpapers/postmarketos.jpg should always point to the
 	# current wallpaper so we don't break configs
-	magick convert "$subpkgdir"/usr/share/wallpapers/postmarketos/contents/images/1924x1924.png \
+	magick convert "$subpkgdir"/usr/share/wallpapers/postmarketos/contents/images/2000x2000.png \
 		-format jpeg \
 		"$subpkgdir"/usr/share/wallpapers/postmarketos.jpg
 }