pmos-base-ui: re-enable DNS filtering (MR 4846)

Alpine aports will have a patch[1] to fix the bug this was working around,
so let's re-enable it.

This reverts commit 4dac896160.

1. https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/61103

fixes #2601

Also see #1430

.ci/shellcheck.sh

@@ -16,6 +16,7 @@ fi
 sh_files="
 	./main/mdss-fb-init-hack/mdss-fb-init-hack.sh
 	./main/postmarketos-base/rootfs-usr-lib-firmwareload.sh
+	./main/postmarketos-base-ui/rootfs-usr-lib-NetworkManager-dispatcher.d-50-dns-filter.sh
 	./main/postmarketos-base-ui/rootfs-usr-lib-NetworkManager-dispatcher.d-50-tethering.sh
 	./main/postmarketos-installkernel/installkernel-pmos
 	./main/postmarketos-initramfs/init.sh