Merge pull request #45793 from nikhita/add-plural-name

Automatic merge from submit-queue

Add plural name for CustomResources example

**What this PR does / why we need it**: Adds plural name for CustomResources example.

There is no field called `name` for CustomResources. Instead it is `plural`. This will also fail validation (https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/kube-apiextensions-server/pkg/apis/apiextensions/validation/validation.go#L33) while executing the instructions mentioned here: https://github.com/kubernetes/kubernetes/issues/45510.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*:

**Special notes for your reviewer**:

**Release note**:

```
NONE
```
@sttts

staging/src/k8s.io/kube-apiextensions-server/artifacts/customresource-01/noxu-resource-definition.yaml

@@ -7,7 +7,7 @@ spec:
   version: v1alpha1
   scope: Namespaced
   names:
-    name: noxus
+    plural: noxus
     singular: noxu
     kind: Noxu
     listKind: NoxuList