shells/rc: Fix readline option

["Periklis Akritidis" <periklis%akritidis.org@localhost>]

Please merge fixlet
TIA

shells/rc$ cvs diff -u Makefile 
Index: Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/shells/rc/Makefile,v
retrieving revision 1.31
diff -u -r1.31 Makefile
--- Makefile    5 Aug 2017 10:45:39 -0000       1.31
+++ Makefile    4 Dec 2024 10:50:31 -0000
@@ -21,7 +21,7 @@
 
 .if !empty(PKG_OPTIONS:Mreadline)
 .include "../../devel/readline/buildlink3.mk"
-CONFIGURE_ARGS+=       --with-readline
+CONFIGURE_ARGS+=       --with-edit=readline
 .endif
 
 .include "../../mk/bsd.pkg.mk"