build(deps): bump sigs.k8s.io/controller-tools from 0.20.1 to 0.21.0

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]

go.mod

@@ -1,6 +1,6 @@
 module github.com/projectcontour/contour
 
-go 1.25.0
+go 1.26.0
 
 require (
 	dario.cat/mergo v1.0.2
@@ -36,16 +36,16 @@ require (
 	gonum.org/v1/plot v0.17.0
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260226221140-a57be14db171
 	google.golang.org/grpc v1.81.1
-	google.golang.org/protobuf v1.36.11
+	google.golang.org/protobuf v1.36.12-0.20260120151049-f2248ac996af
 	gopkg.in/yaml.v3 v3.0.1
-	k8s.io/api v0.35.4
-	k8s.io/apiextensions-apiserver v0.35.4
-	k8s.io/apimachinery v0.35.4
-	k8s.io/client-go v0.35.4
+	k8s.io/api v0.36.0
+	k8s.io/apiextensions-apiserver v0.36.0
+	k8s.io/apimachinery v0.36.0
+	k8s.io/client-go v0.36.0
 	k8s.io/klog/v2 v2.140.0
-	k8s.io/utils v0.0.0-20251002143259-bc988d571ff4
+	k8s.io/utils v0.0.0-20260319190234-28399d86e0b5
 	sigs.k8s.io/controller-runtime v0.23.3
-	sigs.k8s.io/controller-tools v0.20.1
+	sigs.k8s.io/controller-tools v0.21.0
 	sigs.k8s.io/gateway-api v1.3.0
 	sigs.k8s.io/kustomize/kyaml v0.21.1
 )
@@ -62,35 +62,43 @@ require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/chigopher/pathlib v0.19.1 // indirect
 	github.com/cncf/xds/go v0.0.0-20260202195803-dba9d589def2 // indirect
-	github.com/emicklei/go-restful/v3 v3.12.2 // indirect
+	github.com/emicklei/go-restful/v3 v3.13.0 // indirect
 	github.com/envoyproxy/go-control-plane/ratelimit v0.1.0 // indirect
 	github.com/envoyproxy/protoc-gen-validate v1.3.3 // indirect
 	github.com/evanphx/json-patch/v5 v5.9.11 // indirect
-	github.com/fatih/color v1.18.0 // indirect
-	github.com/fsnotify/fsnotify v1.9.0 // indirect
-	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
+	github.com/fatih/color v1.19.0 // indirect
+	github.com/fsnotify/fsnotify v1.10.0 // indirect
+	github.com/fxamacker/cbor/v2 v2.9.1 // indirect
 	github.com/go-asn1-ber/asn1-ber v1.5.7 // indirect
 	github.com/go-errors/errors v1.4.2 // indirect
-	github.com/go-openapi/jsonpointer v0.21.0 // indirect
-	github.com/go-openapi/jsonreference v0.21.0 // 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/go-task/slim-sprig/v3 v3.0.0 // indirect
 	github.com/go-viper/mapstructure/v2 v2.5.0 // indirect
 	github.com/gobuffalo/flect v1.0.3 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/google/btree v1.1.3 // indirect
-	github.com/google/gnostic-models v0.7.0 // indirect
+	github.com/google/gnostic-models v0.7.1 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/pprof v0.0.0-20260402051712-545e8a4df936 // indirect
 	github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // indirect
 	github.com/huandu/xstrings v1.4.0 // indirect
 	github.com/iancoleman/strcase v0.3.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jinzhu/copier v0.4.0 // indirect
-	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/mailru/easyjson v0.9.0 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/miekg/dns v1.1.65 // indirect
@@ -100,12 +108,11 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/prometheus/procfs v0.16.1 // indirect
+	github.com/prometheus/procfs v0.20.1 // indirect
 	github.com/rs/zerolog v1.34.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sagikazarmark/locafero v0.12.0 // indirect
@@ -119,7 +126,7 @@ require (
 	github.com/tsaarni/x500dn v1.1.0 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/xhit/go-str2duration/v2 v2.1.0 // 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/crypto v0.51.0 // indirect
 	golang.org/x/image v0.38.0 // indirect
@@ -128,18 +135,19 @@ require (
 	golang.org/x/sys v0.44.0 // indirect
 	golang.org/x/term v0.43.0 // indirect
 	golang.org/x/text v0.37.0 // indirect
-	golang.org/x/time v0.9.0 // indirect
+	golang.org/x/time v0.15.0 // indirect
 	golang.org/x/tools v0.44.0 // indirect
 	gomodules.xyz/jsonpatch/v2 v2.4.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20260226221140-a57be14db171 // 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
-	k8s.io/code-generator v0.35.4 // indirect
+	k8s.io/code-generator v0.36.0 // indirect
 	k8s.io/gengo/v2 v2.0.0-20250922181213-ec3ebc5fd46b // indirect
-	k8s.io/kube-openapi v0.0.0-20250910181357-589584f1c912 // indirect
+	k8s.io/kube-openapi v0.0.0-20260427204847-8949caaa1199 // indirect
+	k8s.io/streaming v0.36.0 // indirect
 	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
-	sigs.k8s.io/structured-merge-diff/v6 v6.3.2-0.20260122202528-d9cc6641c482 // indirect
+	sigs.k8s.io/structured-merge-diff/v6 v6.4.0 // indirect
 	sigs.k8s.io/yaml v1.6.0 // indirect
 )