Update README.md to match spec_helper.rb

* Updated the README.md snippet to mirror the configuration in the UAT spec_helper.rb which is verified during CI tests of the provider.

README.md

@@ -53,12 +53,14 @@ options[:keys] = ENV['TARGET_KEY']
 options[:host_name] = ENV['TARGET_HOST']
 options[:port] = ENV['TARGET_PORT']
 options[:verify_host_key] = :never unless ENV['SERVERSPEC_HOST_KEY_CHECKING'] =~ (/^(true|t|yes|y|1)$/i)
+backend = ENV.fetch('SERVERSPEC_BACKEND', 'ssh').to_sym
 
+set :backend,      backend
+set :disable_sudo, true
 set :host,         options[:host_name]
-set :ssh_options,  options
-set :backend,      :ssh
-set :display_sudo, true
+set :path,         '/usr/local/bin:$PATH'
 set :request_pty,  true
+set :ssh_options,  options
 ```
 
 Configuration