review: only one crd manifest

Author: mloiseleur

docs/sources/crd.md

@@ -81,11 +81,11 @@ Create the objects of CRD type by filling in the fields of CRD and DNS record wo
 
 ### Example
 
-Here is an example [CRD manifest](crd/crd-manifest.yaml) generated by kubebuilder.
+Here is an example [CRD manifest](https://github.com/kubernetes-sigs/external-dns/blob/HEAD/charts/external-dns/crds/dnsendpoint.yaml) generated by kubebuilder.
 Apply this to register the CRD
 
 ```sh
-$ kubectl apply --validate=false -f docs/sources/crd/crd-manifest.yaml
+$ kubectl apply --server-side=true -f "https://raw.githubusercontent.com/kubernetes-sigs/external-dns/master/charts/external-dns/crds/dnsendpoint.yaml"
 customresourcedefinition.apiextensions.k8s.io "dnsendpoints.externaldns.k8s.io" created
 ```