Update README with scoop install option (#5234)

Signed-off-by: Marcin Kłopotek <marcin.klopotek@gmail.com>
Signed-off-by: Kevin Labesse <kevin@labesse.me>

README.md

@@ -41,6 +41,7 @@ If you want to use a package manager:
 
 - [Homebrew](https://brew.sh/) users can use `brew install kubernetes-helm`.
 - [Chocolatey](https://chocolatey.org/) users can use `choco install kubernetes-helm`.
+- [Scoop](https://scoop.sh/) users can use `scoop install helm`.
 - [GoFish](https://gofi.sh/) users can use `gofish install helm`.
 
 To rapidly get Helm up and running, start with the [Quick Start Guide](https://docs.helm.sh/using_helm/#quickstart-guide).