chore(kubectl): Formatting markdown (#17697)

Amending the formatting of the MD as ```shell was showing up in plain text. Zsh options: "https://kubernetes.io/docs/tasks/tools/install-kubectl/#enabling-shell-autocompletion"
This commit is contained in:
tde908
2019-11-21 21:13:28 +11:00
committed by Kubernetes Prow Robot
parent 9f8d00f37e
commit 3398b6f69d