Replace gcr.io kube-rbac-proxy image (#36)

`gcr.io` is deprecated and will be removed https://cloud.google.com/artifact-registry/docs/transition/prepare-gcr-shutdown

Author: bastjan

config/default/exporter_auth_proxy_patch.yaml

@@ -24,7 +24,7 @@ spec:
           capabilities:
             drop:
               - "ALL"
-        image: gcr.io/kubebuilder/kube-rbac-proxy:v0.13.1
+        image: quay.io/brancz/kube-rbac-proxy:v0.18.2
         args:
         - "--secure-listen-address=0.0.0.0:8443"
         - "--upstream=http://127.0.0.1:8080/"