Install passwd explicitly

It currently gets dragged in by some other package included in
the developer image, but that's not the case for the minimal
image that we're about to reintroduce.

Either way, since we use the command as part of %post, we
shouldn't be relying on an indirect dependency.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>

fedora-riscv64-developer-f40.ks

@@ -58,6 +58,8 @@ uboot-images-riscv64
 dracut-config-generic
 -dracut-config-rescue
 
+passwd
+
 openssh
 openssh-server
 glibc-langpack-en