docs: update WW doc for centos-8
@@ -40,6 +40,6 @@ default location for this example is in
[sms](*\#*) export CHROOT=/opt/ohpc/admin/images/BOSVER
# Build initial chroot image
-[sms](*\#*) wwmkchroot centos-7 $CHROOT
+[sms](*\#*) wwmkchroot centos-8 $CHROOT
\end{lstlisting}
% end_ohpc_run
