stdlib: kubernetes: rename #Apply to #Resources

Code convention: use nouns instead of verbs whenever possible.

Reasoning: One can apply just about anything to Kubernetes via this:
deployment, load balancer, RBAC policy, a custom CRD resource, etc.

Upstream those are called resources: You give `kubectl apply` one or more
manifests and it will create the corresponding resources.

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

tests/stdlib/kubernetes/kubernetes.cue

@@ -26,7 +26,7 @@ TestKubeApply: {
 	}
 
 	// Apply deployment
-	apply: kubernetes.#Apply & {
+	apply: kubernetes.#Resources & {
 		"kubeconfig": kubeconfig
 		namespace:    "dagger-test"
 		manifest:     yaml.Marshal(kubeSrc)