Fix podman machine setup command order

The machine needs to be stopped before being modified

Author: PierreBtz

docs/src/main/asciidoc/podman.adoc

@@ -46,8 +46,8 @@ On systems which involve a Podman Machine managed VM (Mac & Windows), container
 
 [source,bash]
 ----
-podman machine set --rootful=true # or false
 podman machine stop
+podman machine set --rootful=true # or false
 podman machine start
 ----