build(deps): Bump sigs.k8s.io/controller-tools in /tools

Bumps [sigs.k8s.io/controller-tools](https://github.com/kubernetes-sigs/controller-tools) from 0.20.1 to 0.21.0.
- [Release notes](https://github.com/kubernetes-sigs/controller-tools/releases)
- [Changelog](https://github.com/kubernetes-sigs/controller-tools/blob/main/RELEASE.md)
- [Commits](kubernetes-sigs/controller-tools@v0.20.1...v0.21.0)

---
updated-dependencies:
- dependency-name: sigs.k8s.io/controller-tools
  dependency-version: 0.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

tools/go.mod

@@ -5,27 +5,36 @@ go 1.26.0
 require (
 	github.com/jandelgado/gcov2lcov v1.1.1
 	k8s.io/code-generator v0.36.0
-	sigs.k8s.io/controller-tools v0.20.1
+	sigs.k8s.io/controller-tools v0.21.0
 	sigs.k8s.io/kustomize/kustomize/v5 v5.8.1
 )
 
 require (
 	github.com/blang/semver/v4 v4.0.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/fatih/color v1.18.0 // indirect
-	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
+	github.com/fatih/color v1.19.0 // indirect
+	github.com/fxamacker/cbor/v2 v2.9.1 // indirect
 	github.com/go-errors/errors v1.4.2 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
-	github.com/go-openapi/jsonpointer v0.21.0 // indirect
-	github.com/go-openapi/jsonreference v0.20.2 // indirect
-	github.com/go-openapi/swag v0.23.0 // indirect
+	github.com/go-openapi/jsonpointer v0.23.1 // indirect
+	github.com/go-openapi/jsonreference v0.21.5 // indirect
+	github.com/go-openapi/swag v0.26.0 // indirect
+	github.com/go-openapi/swag/cmdutils v0.26.0 // indirect
+	github.com/go-openapi/swag/conv v0.26.0 // indirect
+	github.com/go-openapi/swag/fileutils v0.26.0 // indirect
+	github.com/go-openapi/swag/jsonname v0.26.0 // indirect
+	github.com/go-openapi/swag/jsonutils v0.26.0 // indirect
+	github.com/go-openapi/swag/loading v0.26.0 // indirect
+	github.com/go-openapi/swag/mangling v0.26.0 // indirect
+	github.com/go-openapi/swag/netutils v0.26.0 // indirect
+	github.com/go-openapi/swag/stringutils v0.26.0 // indirect
+	github.com/go-openapi/swag/typeutils v0.26.0 // indirect
+	github.com/go-openapi/swag/yamlutils v0.26.0 // indirect
 	github.com/gobuffalo/flect v1.0.3 // indirect
-	github.com/google/gnostic-models v0.7.0 // indirect
+	github.com/google/gnostic-models v0.7.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/mailru/easyjson v0.7.7 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
@@ -35,31 +44,31 @@ require (
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/xlab/treeprint v1.2.0 // indirect
-	go.yaml.in/yaml/v2 v2.4.3 // indirect
+	go.yaml.in/yaml/v2 v2.4.4 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/mod v0.32.0 // indirect
-	golang.org/x/net v0.49.0 // indirect
-	golang.org/x/sync v0.19.0 // indirect
-	golang.org/x/sys v0.40.0 // indirect
-	golang.org/x/text v0.33.0 // indirect
-	golang.org/x/tools v0.41.0 // indirect
+	golang.org/x/mod v0.35.0 // indirect
+	golang.org/x/net v0.53.0 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/sys v0.43.0 // indirect
+	golang.org/x/text v0.36.0 // indirect
+	golang.org/x/tools v0.44.0 // indirect
 	google.golang.org/protobuf v1.36.12-0.20260120151049-f2248ac996af // indirect
 	gopkg.in/evanphx/json-patch.v4 v4.13.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/api v0.35.0 // indirect
-	k8s.io/apiextensions-apiserver v0.35.0 // indirect
+	k8s.io/api v0.36.0 // indirect
+	k8s.io/apiextensions-apiserver v0.36.0 // indirect
 	k8s.io/apimachinery v0.36.0 // indirect
 	k8s.io/gengo/v2 v2.0.0-20250922181213-ec3ebc5fd46b // indirect
 	k8s.io/klog/v2 v2.140.0 // indirect
-	k8s.io/kube-openapi v0.0.0-20260317180543-43fb72c5454a // indirect
-	k8s.io/utils v0.0.0-20260210185600-b8788abfbbc2 // indirect
+	k8s.io/kube-openapi v0.0.0-20260427204847-8949caaa1199 // indirect
+	k8s.io/utils v0.0.0-20260319190234-28399d86e0b5 // indirect
 	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/kustomize/api v0.21.1 // indirect
 	sigs.k8s.io/kustomize/cmd/config v0.21.1 // indirect
 	sigs.k8s.io/kustomize/kyaml v0.21.1 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
-	sigs.k8s.io/structured-merge-diff/v6 v6.3.2 // indirect
+	sigs.k8s.io/structured-merge-diff/v6 v6.4.0 // indirect
 	sigs.k8s.io/yaml v1.6.0 // indirect
 )