postmarketos-mkinitfs: trigger on upgrades to sd-boot (MR 4525)

Since mkinitfs / boot-deploy install sd-boot in the ESP, it makes sense
to always trigger mkinitfs when sd-boot is upgraded so that we always
boot with the latest supported version.

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

main/postmarketos-mkinitfs/APKBUILD

@@ -2,7 +2,7 @@
 # Co-Maintainer: Clayton Craft <clayton@craftyguy.net>
 pkgname=postmarketos-mkinitfs
 pkgver=2.2.2
-pkgrel=1
+pkgrel=2
 pkgdesc="Tool to generate initramfs images for postmarketOS"
 url="https://postmarketos.org"
 depends="
@@ -10,7 +10,7 @@ depends="
 "
 makedepends="go scdoc"
 replaces="mkinitfs"
-triggers="$pkgname.trigger=/usr/share/mkinitfs/*:/usr/share/kernel/*:/usr/share/mkinitfs-triggers:/usr/share/deviceinfo:/usr/libexec/pmos-tests-initramfs"
+triggers="$pkgname.trigger=/usr/share/mkinitfs/*:/usr/share/kernel/*:/usr/share/mkinitfs-triggers:/usr/share/deviceinfo:/usr/libexec/pmos-tests-initramfs:/usr/lib/systemd/boot"
 # mkinitfs-vendor-$pkgver.tar.gz: vendored Go deps, is part of the release:
 # https://gitlab.com/postmarketOS/postmarketos-mkinitfs/-/releases
 source="