(#9837) Call puppet apply to avoid deprecation warning

If you edit the resource it's immediately applied after exiting the
editor, but it was applied with old syntax that resulted in the deprecation
warning:

warning: Implicit invocation of 'puppet apply' by passing files (or flags) directly
to 'puppet' is deprecated, and will be removed in the 2.8 series.  Please
invoke 'puppet apply' directly in the future.