Fix rcorder example to match the keyword in the description

Differential Revision: https://reviews.freebsd.org/D37686

sbin/rcorder/rcorder.8

@@ -31,7 +31,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 8, 2020
+.Dd December 13, 2022
 .Dt RCORDER 8
 .Os
 .Sh NAME
@@ -170,7 +170,7 @@ $ rcorder /etc/rc.d/* /usr/local/etc/rc.d/*
 .Ed
 .Pp
 Count the number of services in the base system, which specify the
-.Sy shutdown
+.Sy nostart
 keyword, while skipping those with
 .Sy firstboot
 and