chore(deps): update quay.io/brancz/kube-rbac-proxy docker tag to v0.18.1

Author: renovate[bot]

chart/db-controller/values.yaml

@@ -122,7 +122,7 @@ prometheusRule:
 
 kubeRBACProxy:
   enabled: true
-  image: quay.io/brancz/kube-rbac-proxy:v0.14.2
+  image: quay.io/brancz/kube-rbac-proxy:v0.18.1
   securityContext:
     allowPrivilegeEscalation: false
     capabilities: