cups.service.in: Order after time-set.target

Multiple functions that are called either implicitly or explicitly require a "roughly correct" CLOCK_REALTIME to behave.

Author: zdohnal

scheduler/cups.service.in

@@ -1,7 +1,7 @@
 [Unit]
 Description=CUPS Scheduler
 Documentation=man:cupsd(8)
-After=network.target nss-user-lookup.target nslcd.service
+After=network.target nss-user-lookup.target time-set.target nslcd.service
 Requires=cups.socket
 
 [Service]