cmd/k8s-operator: update RBAC to allow creating events

The new ingress reconcile raises events on failure, but I forgot to
add the updated permission.

Updates #502

Signed-off-by: Maisem Ali <maisem@tailscale.com>

cmd/k8s-operator/manifests/operator.yaml

@@ -48,7 +48,7 @@ metadata:
   name: tailscale-operator
 rules:
 - apiGroups: [""]
-  resources: ["services", "services/status"]
+  resources: ["events", "services", "services/status"]
   verbs: ["*"]
 - apiGroups: ["networking.k8s.io"]
   resources: ["ingresses", "ingresses/status"]