cltadm.8: Correct documentation of -r arg to port command

-r does not take a target port argument

Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D42932

(cherry picked from commit f12d378f4f)

usr.sbin/ctladm/ctladm.8

@@ -35,7 +35,7 @@
 .\"
 .\" $Id: //depot/users/kenm/FreeBSD-test2/usr.sbin/ctladm/ctladm.8#3 $
 .\"
-.Dd March 9, 2021
+.Dd December 27, 2023
 .Dt CTLADM 8
 .Os
 .Sh NAME
@@ -167,7 +167,7 @@
 .Op Fl W Ar wwnn
 .Op Fl O Ar pp|vp
 .Op Fl p Ar targ_port
-.Op Fl r Ar targ_port
+.Op Fl r
 .Op Fl t Ar fe_type
 .Nm
 .Ic portlist