machinectl: fix status output indentation

All other status output lines use tabs, use that for the ID shift line
too. otherwise output will appear unaligned if log viewers have fixed
tab stop positions.

src/machine/machinectl.c

@@ -484,7 +484,7 @@ static int print_uid_shift(sd_bus *bus, const char *name) {
         if (shift == 0) /* Don't show trivial mappings */
                 return 0;
 
-        printf("       UID Shift: %" PRIu32 "\n", shift);
+        printf("\tID Shift: %" PRIu32 "\n", shift);
         return 0;
 }