OCPBUGS#13339: Update 'config' to 'config/'

Author: xenolinux

modules/osdk-helm-project-layout.adoc

@@ -12,7 +12,7 @@ Helm-based Operator projects generated using the `operator-sdk init --plugins he
 
 |File/folders |Purpose
 
-|`config`
+|`config/`
 |link:https://kustomize.io/[Kustomize] manifests for deploying the Operator on a Kubernetes cluster.
 
 |`helm-charts/`