cluster/certs: update k0 certs

This leaves us with the next set of expiring certs in September 2021.

Fixes b/36.

Change-Id: I536497626c0dd3807fccf28d4b61e5e531cf8d9c
diff --git a/cluster/certs/etcd-kube.cert b/cluster/certs/etcd-kube.cert
index dd0b91f..e82996d 100644
--- a/cluster/certs/etcd-kube.cert
+++ b/cluster/certs/etcd-kube.cert
@@ -1,9 +1,9 @@
 -----BEGIN CERTIFICATE-----
-MIIFAjCCA+qgAwIBAgIUSc+yoWMgxteBtdswAaa+RZmh6hwwDQYJKoZIhvcNAQEL
+MIIFAjCCA+qgAwIBAgIUUEhDcCROm93ooEjAxFNPNj2lqycwDQYJKoZIhvcNAQEL
 BQAweDELMAkGA1UEBhMCUEwxFDASBgNVBAgTC01hem93aWVja2llMQ8wDQYDVQQH
 EwZXYXJzYXcxGzAZBgNVBAoTEldhcnNhdyBIYWNrZXJzcGFjZTETMBEGA1UECxMK
-Y2x1c3RlcmNmZzEQMA4GA1UEAxMHZXRjZCBjYTAeFw0yMDAzMjgxNTE1MDBaFw0y
-MTAzMjgxNTE1MDBaMGoxCzAJBgNVBAYTAlBMMRQwEgYDVQQIEwtNYXpvd2llY2tp
+Y2x1c3RlcmNmZzEQMA4GA1UEAxMHZXRjZCBjYTAeFw0yMTAzMjcxMTI3MDBaFw0y
+MjAzMjcxMTI3MDBaMGoxCzAJBgNVBAYTAlBMMRQwEgYDVQQIEwtNYXpvd2llY2tp
 ZTEPMA0GA1UEBxMGV2Fyc2F3MSUwIwYDVQQLExxrdWJlIGV0Y2QgY2xpZW50IGNl
 cnRpZmljYXRlMQ0wCwYDVQQDEwRrdWJlMIICIjANBgkqhkiG9w0BAQEFAAOCAg8A
 MIICCgKCAgEAw5jdxQxtELgpg+M1jib4VklzIJ4ULrKH59xKxs6qK0iGJClc8EFv
@@ -20,10 +20,10 @@
 kTCBjjAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUF
 BwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFB3FpZrvkz7oq25DKwzCMiKCCsgM
 MB8GA1UdIwQYMBaAFPFZuGZNPsPnQu6Bo9RGfzlTdfkPMA8GA1UdEQQIMAaCBGt1
-YmUwDQYJKoZIhvcNAQELBQADggEBAHGsNqvBFSQC8qWqTTCtghbmF6nQqyhwEgsn
-L/29QMgmNx234r41JPymEN8R2bMFHuMDrOgEliXcbqcirpOuCvx3nln8gFmimtN5
-q7MEjAllJHqa1sjx+O83TNToFkmc8gxUsDqdngrsS1IoEbs8tIP7P/Y80gshCUfz
-2Fnqv1/m8h04RJ7E8Vgxq9txR3JmZPWbFtiHTb7Izlv6y9c+mtCDwzFb8ZiXCfSe
-TFBOptEjx5S82kj7LgYvtngz99ZojoCeQnqczbnHagw7yLH+NqF1SpTr6xZKzdQ+
-hh5Zna0whQCAy2wF5paW3asPNb7Sh90xXARynYxuvCKAIeurAI0=
+YmUwDQYJKoZIhvcNAQELBQADggEBAAJKhH5A1TrRnfkNK/ukfbZ08c4xI1jJaJ4X
+iQ01uxL8j2L6mMiyDeFCjybdg63N/x6dVjvP+fFHd+uF9gJBq/40XD9pMXd4yFeg
+UPzuLwLEJCFEdebsl6u0SH1Gl5Enw5mGUeK1wefX0pfV5JpcLGKTE3TtiksKFYKd
+dzASP1DF7U0zGpiWjdhsIG0ISGZioUvSOCTj9t+qI7rDygaUPtSFFmSIYoiCjeSN
+qsfA78ZQA0N9a1wwmvjl+P4V0uznCcXfUQpMH6I6wDGXOwE66+h7ZJoAu2fJeTah
+2qWASJP3ojXF9Pfg5nwDvAUgAh/xZfc3zOJAIfGAuFHw5wYZ3JQ=
 -----END CERTIFICATE-----