Patch layout service renderJsonRendering

LayoutServicePatch.config

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
 <sitecore>
    <pipelines>
        <group groupName="layoutService">
        <!-- NOTE: This patch will be have a slightly different signature in Headless Services for Sitecore 9.x vs 10. The below works for Headless Services in Sitecore 10 -->
	    <pipelines>
		<renderJsonRendering>
		    <processor type="JSSDemo.Foundation.LayoutService.PipelineProcessors.CustomInitialize, JSSDemo.Foundation.LayoutService" resolve="true"
			 patch:instead="*[@type='Sitecore.LayoutService.Presentation.Pipelines.RenderJsonRendering.Initialize, Sitecore.LayoutService']"/>
		 </renderJsonRendering>
	    </pipelines>
      	</group>
    </pipelines>
  </sitecore>
</configuration>