- When proxying to an aggregated API server, kube-apiserver used the
  `EndpointSlices` of the `service` indicated by the `APIServer`, rather than
  using Endpoints.
  
  If you were using the aggregated API server feature, and you were writing out
  the endpoints for it by hand (rather than letting kube-controller-manager
  generate `Endpoints` and `EndpointSlices` for it automatically based on the

- Endpoints resources created by the Endpoints controller now include a label indicating this.
  Users who manually create Endpoints can also add this label, but they should consider
  using `EndpointSlices` instead. ([#130564](https://github.com/kubernetes/kubernetes/pull/130564), [@danwinship](https://github.com/danwinship)) [SIG Apps and Network]