chore(deps): update helm release external-dns to v1.18.0

Author: renovate[bot]

bootstrap/kubernetes-base/external-dns.tf

@@ -22,7 +22,7 @@ resource "helm_release" "external_dns" {
 
   repository = "https://kubernetes-sigs.github.io/external-dns/"
   chart      = "external-dns"
-  version    = "1.17.0"
+  version    = "1.18.0"
 
   namespace = "sys-external-dns"
   name      = "external-dns"