Update WSH command reference docs (#1865)

Fix formatting errors, update `wsh file` docs

Author: esimkowitz

cmd/wsh/cmd/wshcmd-wsl.go

@@ -16,7 +16,7 @@ import (
 var distroName string
 
 var wslCmd = &cobra.Command{
-	Use:     "wsl [-d <Distro>]",
+	Use:     "wsl [-d <distribution-name>]",
 	Short:   "connect this terminal to a local wsl connection",
 	Args:    cobra.NoArgs,
 	RunE:    wslRun,