Update cheatsheets

tldr/kubectl-completion

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# kubectl completion
+
+> Generate shell completion code for `kubectl` commands.
+> More information: <https://kubernetes.io/docs/reference/kubectl/generated/kubectl_completion/>.
+
+- Print the completion script for Bash, Zsh, fish, or PowerShell:
+
+`kubectl completion {{bash|zsh|fish|powershell}}`
+
+- Load Bash or Zsh completions into the current shell session:
+
+`source <(kubectl completion {{bash|zsh}})`
+
+- Append Bash completion script to `~/.bashrc`:
+
+`kubectl completion bash >> ~/.bashrc`
+
+- Write Zsh completion script to a file in the `fpath`:
+
+`kubectl completion zsh > "${fpath[1]}/_kubectl"`
+
+- Load fish completions into the current shell session:
+
+`kubectl completion fish | source`
+
+- Persist fish completions:
+
+`kubectl completion fish > ~/.config/fish/completions/kubectl.fish`
+
+- Load PowerShell completions into the current shell session:
+
+`kubectl completion powershell | Out-String | Invoke-Expression`
+
+- Persist PowerShell completions:
+
+`kubectl completion powershell >> $PROFILE`