build(deps): bump k8s.io/client-go from 0.21.0 to 0.21.1 (#4646)

Bumps [k8s.io/client-go](https://github.com/kubernetes/client-go) from 0.21.0 to 0.21.1.
- [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/v0.21.0...v0.21.1)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Chris O'Haver <cohaver@infoblox.com>

go.mod

@@ -34,8 +34,8 @@ require (
 	google.golang.org/api v0.47.0
 	google.golang.org/grpc v1.37.1
 	gopkg.in/DataDog/dd-trace-go.v1 v1.28.0
-	k8s.io/api v0.21.0
+	k8s.io/api v0.21.1
 	k8s.io/apimachinery v0.21.1
-	k8s.io/client-go v0.21.0
+	k8s.io/client-go v0.21.1
 	k8s.io/klog v1.0.0
 )