fix template

templates/postgresql.conf.erb

@@ -95,7 +95,7 @@ max_connections     = <%= @pl_max_conn %>
 
 # - Shared Library Preloading -
 <% if @pl_manage_extensions == true -%>
-shared_preload_libraries = '<%= @pl_reqpackages_extensions %>'
+shared_preload_libraries = '<%= @reqpackages_extensions %>'
 <% else -%>
 # shared_preload_libraries = ''
 <% end -%>