06-enable-mdns-on-systemd.sh: Add checking systemd-resolved.service is enabled

Signed-off-by: Norio Nomura <norio.nomura@gmail.com>

Author: norio-nomura

pkg/driver/vz/boot/06-enable-mdns-on-systemd.sh

@@ -12,6 +12,7 @@ fi
 
 # It depends on systemd-resolved
 command -v systemctl >/dev/null 2>&1 || exit 0
+systemctl is-enabled -q systemd-resolved.service || exit 0
 command -v resolvectl >/dev/null 2>&1 || exit 0
 
 # Configure systemd-resolved to enable mDNS resolution globally