Update base image to alpine 3.16

data/Dockerfiles/unbound/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.15
+FROM alpine:3.16
 
 LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
 

docker-compose.yml

@@ -2,7 +2,7 @@ version: '2.1'
 services:
 
     unbound-mailcow:
-      image: mailcow/unbound:1.15
+      image: mailcow/unbound:1.16
       environment:
         - TZ=${TZ}
       volumes: