Update k8s modules to v0.20.15 (#65)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

go.mod

@@ -5,8 +5,8 @@ go 1.17
 require (
 	github.com/giantswarm/k8smetadata v0.23.0
 	github.com/google/go-cmp v0.6.0
-	k8s.io/api v0.20.12
-	k8s.io/apimachinery v0.20.12
+	k8s.io/api v0.20.15
+	k8s.io/apimachinery v0.20.15
 	sigs.k8s.io/yaml v1.3.0
 )
 

go.sum

@@ -229,16 +229,16 @@ gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 h1:tQIYjPdBoyREyB9XMu+nnTclp
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-k8s.io/api v0.20.12 h1:LfRpmRkJLwPP8eaYehsVVmIIfg1yCBIIUHaSsdqCgHA=
-k8s.io/api v0.20.12/go.mod h1:A2brwyEkVLM3wQGNnzoAa5JsQRzHK0uoOQ+bsnv7V68=
-k8s.io/apimachinery v0.20.12 h1:2c0LIVNMvB8k2Ozstmhl2zGeCEcPazznuLYEwxFdNjM=
-k8s.io/apimachinery v0.20.12/go.mod h1:uM7hCI0NyBymUwgshMgZyte475lxhr+QH6h3cvdnzEc=
+k8s.io/api v0.20.15 h1:7PoPWNuE/pFFhMIQCuto88+63TIjSlCviXknxWCHLVs=
+k8s.io/api v0.20.15/go.mod h1:X3JDf1BiTRQQ6xNAxTuhgi6yL2dHc6fSr9LGzE+Z3YU=
+k8s.io/apimachinery v0.20.15 h1:tZW9jhDILQJq0fYXq7/t0xulj+73HzxLVBUGLCNg9uM=
+k8s.io/apimachinery v0.20.15/go.mod h1:4KFiDSxCoGviCiRk9kTXIROsIf4VSGkVYjVJjJln3pg=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.4.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.9.0 h1:D7HV+n1V57XeZ0m6tdRkfknthUaM06VFbWldOFh8kzM=
 k8s.io/klog/v2 v2.9.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec=
-k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd/go.mod h1:WOJ3KddDSol4tAGcJo0Tvi+dK12EcqSLqcWsryKMpfM=
+k8s.io/kube-openapi v0.0.0-20211110013926-83f114cd0513/go.mod h1:WOJ3KddDSol4tAGcJo0Tvi+dK12EcqSLqcWsryKMpfM=
 sigs.k8s.io/structured-merge-diff/v4 v4.0.2/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
 sigs.k8s.io/structured-merge-diff/v4 v4.1.2 h1:Hr/htKFmJEbtMgS/UD0N+gtgctAqz81t3nu+sPzynno=
 sigs.k8s.io/structured-merge-diff/v4 v4.1.2/go.mod h1:j/nl6xW8vLS49O8YvXW1ocPhZawJtm+Yrr7PPRQ0Vg4=