Update gcr.io/kubebuilder/kube-rbac-proxy Docker tag to v0.16.0 (#191)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

config/default/manager_auth_proxy_patch.yaml

@@ -10,7 +10,7 @@ spec:
     spec:
       containers:
       - name: kube-rbac-proxy
-        image: gcr.io/kubebuilder/kube-rbac-proxy:v0.5.0
+        image: gcr.io/kubebuilder/kube-rbac-proxy:v0.16.0
         args:
         - "--secure-listen-address=0.0.0.0:8443"
         - "--upstream=http://127.0.0.1:8080/"