Add note tags and version prefix

Author: mrgiles

content/en/docs/reference/kubectl/cheatsheet.md

@@ -15,7 +15,10 @@ card:
 
 This page contains a list of commonly used `kubectl` commands and flags.
 
-These instructions are for Kubernetes {{< skew currentVersion >}}. To check the version, use the `kubectl version` command.
+{{< note >}}
+These instructions are for Kubernetes v{{< skew currentVersion >}}. To check the version, use the `kubectl version` command.
+{{< /note >}}
+
 <!-- body -->
 
 ## Kubectl autocomplete