fix: missing schema entries [ci skip]

Author: Maurice Faber

src/openapi/settings.yaml

@@ -135,9 +135,14 @@ Settings:
           description: Set this to true when an external load balancer exists (Azure AppGW, Google Apigee) or needs to be started (AWS ALB). This will then be configured through ingress controllers. Expects existing LBs to terminate https. Currently this is only working correctly for Azure, and not for AWS and Google. AWS is close to completion.
           title: External load balancer
           type: boolean
+        hasExternalDNS:
+          description: Set this to true when an external dns zone is available to manage dns records. (Expects required `dns:` fields to be set.)
+          default: true
+          title: External DNS
+          type: boolean
         hasExternalIDP:
           default: false
-          description: Set this to true when you bring your own IDP that supports OIDC. (Then you must also fill in the OIDC settings.)
+          description: Set this to true when bringing your own external IDP such as Azure AD. (Expects required `oidc:` fields to be set.)
           title: External IDP
           type: boolean
         isHomeMonitored: