targetNamespace namespace can be part of kustomization

Signed-off-by: Carl Bordum Hansen <[email protected]>

docs/spec/v1/kustomization.md

@@ -211,7 +211,8 @@ overrides the [Kustomize `namespace`](https://kubectl.docs.kubernetes.io/referen
 
 While `.spec.targetNamespace` is optional, if this field is non-empty then the
 Kubernetes namespace being pointed to must exist prior to the Kustomization
-being applied, kustomize-controller will not create the namespace.
+being applied _or_ be part of the Kustomization. kustomize-controller will not
+create the namespace implicitly.
 
 ### Suspend