Correct the usage of mktemp:

The old version lists all args as optional.
However, you need at least one arg to get a usable result.

PR:		18667
Reported by:	obrien
Submitted by:	Johan Karlsson <k@numeri.campus.luth.se>
Reviewed by:	sheldonh

usr.bin/mktemp/mktemp.1

@@ -44,7 +44,12 @@
 .Op Fl q
 .Op Fl t Ar prefix
 .Op Fl u
-.Op Ar template ...
+.Ar template ...
+.Nm mktemp
+.Op Fl d
+.Op Fl q
+.Op Fl u
+.Fl t Ar prefix
 .Sh DESCRIPTION
 The
 .Nm

usr.bin/mktemp/mktemp.c

@@ -145,6 +145,8 @@ static void
 usage()
 {
 	fprintf(stderr,
-		"usage: mktemp [-d] [-q] [-t prefix] [-u] [template ...]\n");
+		"usage: mktemp [-d] [-q] [-t prefix] [-u] template ...\n");
+	fprintf(stderr,
+		"       mktemp [-d] [-q] [-u] -t prefix \n");
 	exit (1);
 }