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-calico.cert b/cluster/certs/etcd-calico.cert
index bbcd91d..601ae3b 100644
--- a/cluster/certs/etcd-calico.cert
+++ b/cluster/certs/etcd-calico.cert
@@ -1,9 +1,9 @@
 -----BEGIN CERTIFICATE-----
-MIIFBjCCA+6gAwIBAgIUZmjAlqCosP9W/6X/iIMLRrNb/bkwDQYJKoZIhvcNAQEL
+MIIFBjCCA+6gAwIBAgIURfleic2TJVIf8/RH1K4m9wQpqUEwDQYJKoZIhvcNAQEL
 BQAweDELMAkGA1UEBhMCUEwxFDASBgNVBAgTC01hem93aWVja2llMQ8wDQYDVQQH
 EwZXYXJzYXcxGzAZBgNVBAoTEldhcnNhdyBIYWNrZXJzcGFjZTETMBEGA1UECxMK
-Y2x1c3RlcmNmZzEQMA4GA1UEAxMHZXRjZCBjYTAeFw0yMDAzMjgxNTE1MDBaFw0y
-MTAzMjgxNTE1MDBaMGwxCzAJBgNVBAYTAlBMMRQwEgYDVQQIEwtNYXpvd2llY2tp
+Y2x1c3RlcmNmZzEQMA4GA1UEAxMHZXRjZCBjYTAeFw0yMTAzMjcxMTI3MDBaFw0y
+MjAzMjcxMTI3MDBaMGwxCzAJBgNVBAYTAlBMMRQwEgYDVQQIEwtNYXpvd2llY2tp
 ZTEPMA0GA1UEBxMGV2Fyc2F3MSUwIwYDVQQLExxyb290IGV0Y2QgY2xpZW50IGNl
 cnRpZmljYXRlMQ8wDQYDVQQDEwZjYWxpY28wggIiMA0GCSqGSIb3DQEBAQUAA4IC
 DwAwggIKAoICAQC9VRlI8AnvZKPMhtDef9mrYydfINlI/QS8+CE8aLkFfhQQJHyj
@@ -20,10 +20,10 @@
 o4GTMIGQMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYB
 BQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUYjrCSKoTAgECdKZTntUm3/7d
 2PUwHwYDVR0jBBgwFoAU8Vm4Zk0+w+dC7oGj1EZ/OVN1+Q8wEQYDVR0RBAowCIIG
-Y2FsaWNvMA0GCSqGSIb3DQEBCwUAA4IBAQCQV/w/TOPjnCJszWqLd5GeoEkPPE8o
-qevGTmTpm+/l/vlFERDsUB2kKnxb4mHBbVo2c2ux0aF53wKeIcp5/fdfH1LFjS67
-YY9hLce3zFmZMCEbkFGgpjQKpNy4zB72f4ksGRzbPienFLhghhY1dIv5Rdrhyz1O
-xhrUP9fgJHjYd33pFVfhyl8mIOon8yn+4AvGLrPATgp4dmkF+HM3EYtqd2LfeHVy
-Dc9PbjpmIGHz6IKpMKC4S6rlnnfzbk2PRULVcXHPtfX9ihXz+B892IORDK8jgSe8
-PdVe3ZGMo1EbSwQ9WwGZMrIqeiX1vfaEOhZgaw8GMuFM75OBK9yRopZ/
+Y2FsaWNvMA0GCSqGSIb3DQEBCwUAA4IBAQBt/hQm567Ov+Qptp5QipPUn4Isv/Uq
+zZHSR5xpBMiCl3IKoQuzWyjpbQNey9QAyT/m/7mq+T7p4uKsFKaNQOOOQOH8TNpj
+fWiVwUEQWvwv98zGNYikFD6c+9st+Psh8xsPjqonMgYAra3jn7pNHBV4thQ1i4cm
+YcCUT7ZLw+tyC1z148bctqIUy342srxTupC5xsfv8xkITvakwmwBfNCbeZNxKzJS
+i/zl3EK6y+/biszXGresskQ/fTVPrWfC6oGudv8AG+SASocYztYS41BCoYuy4L8d
+tIB532AqywFH5S0qMXB73bObaJy88A5qdK0kd4sMrxJ8q9NNeZy2AdaD
 -----END CERTIFICATE-----