servicemesh/8-egress makes reference to now.httpbin.org in doc

[komish]

This workshop: https://learn.openshift.com/servicemesh/8-egress Makes a reference in the documentation text to now.httpbin.org, but I believe this was changed to worldclockapi.com

https://github.com/openshift-labs/learn-katacoda/blob/master/servicemesh/8-egress/2istioize-egress.md

Wanted to be sure before I submitted a PR to make the change or bundled it into #610

[BenHall]

@komish

Thanks for pointing this out. Please add to #610. I'll check and merge this soon.

[komish]

@BenHall Done and done. Thanks!