chore(deps): bump k8s.io/client-go from 0.25.3 to 0.25.4

Bumps [k8s.io/client-go](https://github.com/kubernetes/client-go) from 0.25.3 to 0.25.4.
- [Release notes](https://github.com/kubernetes/client-go/releases)
- [Changelog](https://github.com/kubernetes/client-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kubernetes/client-go/compare/v0.25.3...v0.25.4)

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/robfig/cron v1.2.0
 	github.com/sanity-io/litter v1.5.5
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
-	k8s.io/api v0.25.3
-	k8s.io/apimachinery v0.25.3
-	k8s.io/client-go v0.25.3
+	k8s.io/api v0.25.4
+	k8s.io/apimachinery v0.25.4
+	k8s.io/client-go v0.25.4
 )