Merge pull request #525 from containeroo/renovate/kubernetes-sigs-controller-tools-0.x

chore(deps): update dependency kubernetes-sigs/controller-tools to v0.21.0

Author: gi8lino

Makefile

@@ -68,7 +68,7 @@ GEN_API_REF_DOCS_VERSION ?= v0.3.0
 
 ## Tool Versions
 KUSTOMIZE_VERSION ?= v5.7.1
-CONTROLLER_TOOLS_VERSION ?= v0.20.1
+CONTROLLER_TOOLS_VERSION ?= v0.21.0
 
 # ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
 ENVTEST_K8S_VERSION = 1.34.1