Update k8s GPU doc (#1873)
Update k8s GPU doc (#1873)

* Update k8s GPU doc

* k8s gpu doc: remove reference to LD_LIBRARY_PATH

rjtsdl/acs-engine,weinong/acs-engine,weinong/acs-engine,anhowe/acs-engine,jackfrancis/acs-engine,yangl900/acs-engine,jackfrancis/acs-engine,yangl900/acs-engine,rocketraman/acs-engine,anhowe/acs-engine,weinong/acs-engine,jackfrancis/acs-engine,rocketraman/acs-engine,Azure/acs-engine,rjtsdl/acs-engine,rjtsdl/acs-engine,rjtsdl/acs-engine,Azure/acs-engine,weinong/acs-engine,Azure/acs-engine,rjtsdl/acs-engine,jackfrancis/acs-engine,anhowe/acs-engine,yangl900/acs-engine,anhowe/acs-engine,anhowe/acs-engine,rocketraman/acs-engine,yangl900/acs-engine,Azure/acs-engine,rocketraman/acs-engine,Azure/acs-engine,weinong/acs-engine,jackfrancis/acs-engine,yangl900/acs-engine