Update quay.io/brancz/kube-rbac-proxy Docker tag to v0.20.0

| datasource | package | from | to | | ---------- | ------------------------------ | ------- | ------- | | docker | quay.io/brancz/kube-rbac-proxy | v0.18.0 | v0.20.0 | Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

bundle/manifests/nginx-ingress-operator.clusterserviceversion.yaml

@@ -443,7 +443,7 @@ spec:
  - --upstream=http://127.0.0.1:8080/
  - --logtostderr=true
  - --v=0
- image: quay.io/brancz/kube-rbac-proxy:v0.18.0
+ image: quay.io/brancz/kube-rbac-proxy:v0.20.0
  name: kube-rbac-proxy
  ports:
  - containerPort: 8443

config/default/kustomization.yaml

@@ -31,4 +31,4 @@ patches:
 images:
 - name: kube-rbac-proxy
  newName: quay.io/brancz/kube-rbac-proxy
- newTag: v0.18.0
+ newTag: v0.20.0