fixed broken links to content handbooks that happened when we broke them into multiple handbooks for all of the roles. Also simplified it a bit to link to page containing all of the roles.
fixed broken links to content handbooks that happened when we broke them into multiple handbooks for all of the roles. Also simplified it a bit to link to page containing all of the roles.

pwittrock/community,kubernetes/community,kubernetes/community,pwittrock/community,kubernetes/community