Bump sigs.k8s.io/controller-tools from 0.5.0 to 0.6.0

Bumps [sigs.k8s.io/controller-tools](https://github.com/kubernetes-sigs/controller-tools) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/kubernetes-sigs/controller-tools/releases)
- [Changelog](https://github.com/kubernetes-sigs/controller-tools/blob/master/RELEASE.md)
- [Commits](kubernetes-sigs/controller-tools@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: sigs.k8s.io/controller-tools
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -21,5 +21,5 @@ require (
 	k8s.io/client-go v0.21.1
 	k8s.io/code-generator v0.21.1
 	k8s.io/gengo v0.0.0-20210203185629-de9496dff47b // indirect
-	sigs.k8s.io/controller-tools v0.5.0
+	sigs.k8s.io/controller-tools v0.6.0
 )