* Fixes issue where if the audit log is enabled and anonymous authentication is disabled, then an unauthenticated user request will cause a panic and crash the `kube-apiserver`. ([#38717](https://github.com/kubernetes/kubernetes/pull/38717), [@deads2k](https://github.com/deads2k))

## Known Issues for v1.5.1

        code = 401,
        headers = headersOf("WWW-Authenticate", "Basic realm=\"protected area\""),
        body = "Please authenticate.",
      ),
    )
    server.enqueue(
      MockResponse(body = "Authenticated!"),
    )
    java.net.Authenticator.setDefault(RecordingAuthenticator())
    client =
      client.newBuilder()
        .authenticator(JavaNetAuthenticator())
        .build()
    val request =

* Bump GCI to gci-beta-56-9000-80-0 ([#41027](https://github.com/kubernetes/kubernetes/pull/41027), [@dchen1107](https://github.com/dchen1107))
* Move b.gcr.io/k8s_authenticated_test to gcr.io/k8s-authenticated-test ([#40335](https://github.com/kubernetes/kubernetes/pull/40335), [@zmerlynn](https://github.com/zmerlynn))