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/kube-serviceaccounts.cert b/cluster/certs/kube-serviceaccounts.cert
index 7ba5a5f..b572b1b 100644
--- a/cluster/certs/kube-serviceaccounts.cert
+++ b/cluster/certs/kube-serviceaccounts.cert
@@ -1,9 +1,9 @@
 -----BEGIN CERTIFICATE-----
-MIIFKjCCBBKgAwIBAgIUC8G46cdD+fUIfepfl2RRtz7D5FgwDQYJKoZIhvcNAQEL
+MIIFKjCCBBKgAwIBAgIUXRB0XNQ/Tdv1fPq8iQTbrkHH1q0wDQYJKoZIhvcNAQEL
 BQAwgYMxCzAJBgNVBAYTAlBMMRQwEgYDVQQIEwtNYXpvd2llY2tpZTEPMA0GA1UE
 BxMGV2Fyc2F3MRswGQYDVQQKExJXYXJzYXcgSGFja2Vyc3BhY2UxEzARBgNVBAsT
-CmNsdXN0ZXJjZmcxGzAZBgNVBAMTEmt1YmVybmV0ZXMgbWFpbiBDQTAeFw0yMDAz
-MjgxNTE1MDBaFw0yMTAzMjgxNTE1MDBaMHsxCzAJBgNVBAYTAlBMMRQwEgYDVQQI
+CmNsdXN0ZXJjZmcxGzAZBgNVBAMTEmt1YmVybmV0ZXMgbWFpbiBDQTAeFw0yMTAz
+MjcxMTI3MDBaFw0yMjAzMjcxMTI3MDBaMHsxCzAJBgNVBAYTAlBMMRQwEgYDVQQI
 EwtNYXpvd2llY2tpZTEPMA0GA1UEBxMGV2Fyc2F3MSswKQYDVQQLEyJLdWJlcm5l
 dGVzIFNlcnZpY2UgQWNjb3VudHMgU2lnbmVyMRgwFgYDVQQDEw9zZXJ2aWNlYWNj
 b3VudHMwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQDFSCquXVjQANUN
@@ -21,10 +21,10 @@
 oDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAd
 BgNVHQ4EFgQUliCshdOww6BLgNw1Cu+0XiqCpg8wHwYDVR0jBBgwFoAUmDJdDk8z
 HvsJ6YkkExZCaoDRmdAwGgYDVR0RBBMwEYIPc2VydmljZWFjY291bnRzMA0GCSqG
-SIb3DQEBCwUAA4IBAQB7xM6vfvk3dw9cFP0F2YTAxLVot1E+KzHWz952uIm3CrtU
-Vq3WHBX3NRTVrzg3Ycx4tNniOHBqNrzgksz0XmFZw7VyiY+yEzueVCJ9HU9y8Kb2
-XdL5zqTtgVYspr0dI/34NbGnFVJAOJ57fAc4LxhPwAZMG6s4LwDiBDYIBw+KoJsD
-FOiHJ+AfW5taGONEGY+HuNnSo+RllCgFdjPW0hK4X8Jt4p5Qr+oICO4Nzp4jZwv0
-WqxHzmX4DYDQLztqrQelSDkaQaP/xAhq7nsaK91sMob1OqQcYSMckm2SFEmTwBCs
-VpJg24y/LRw1LPK4lE7GGGIkyko+aDCsIm+YDX7U
+SIb3DQEBCwUAA4IBAQAUVM1a6fB91WStX1xqKBfujxfWba3od5EaHQsKzXqsY6F3
+C87ush2JdJ/4Tq/D6xqcaOY7MUOSuL8LLlBafErbfjfVEKpG1muYwignYn0B0376
+nq9knFNYGQsNP3DwVqoFq/7hoQiyF/aBndL5gTAdoj/C30pIjG/wi8MlLsuX5h0n
+Qip3Fq6kjb6GY49Yo2Z9AchPIYotuubJEOwMLXqo48uWR2FOBrrDNSJtFIm6wcn3
+B2sjpApxv+p+lD0tApHSMbrJhijqAv5MOG6p3zIL62QM+zwBK4dtsOAeYX/cEE24
+tb56uVqXXoCICv2+TyO5NCJRP98ML+/WdHxlYvIw
 -----END CERTIFICATE-----