Update /ja/docs/tasks/tools/install-kubectl/#18137

Merged

k8s-ci-robot merged 3 commits intokubernetes:dev-1.16-ja.1from inductor:feature/update_install_kubectl

Dec 16, 2019

+42-14

Commits on Dec 15, 2019

update /docs/ja/tasks/tools/install-kubectl/
inductor
committed
fix mongon
inductor
committed
apply reveiw
inductor
committed