Add instruction to install using Scoop (#5566)

Added the `scoop install skaffold` command line to install using https://scoop.sh/

Author: GrooveCS

docs/content/en/docs/install/_index.md

@@ -144,6 +144,15 @@ For more information about this defect see
 choco install -y skaffold
 ```
 
+### Scoop
+
+Skaffold can be installed using the [Scoop package manager](https://scoop.sh/).
+This package is not maintained by the Skaffold team.
+
+```powershell
+scoop install skaffold
+```
+
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