docker-compose.yml - update nextcloud to v24

The upgrade was actually executed in steps, v22 -> v23 -> v24, and the
net result committed.

templates/docker-compose/docker-compose.yml

@@ -54,7 +54,7 @@ services:
       - redis:/data
 
   nextcloud:
-    image: nextcloud:22-fpm-alpine
+    image: nextcloud:24-fpm-alpine
     restart: always
     volumes:
       - nextcloud_src:/var/www/html
@@ -74,7 +74,7 @@ services:
 #      test: ["CMD-SHELL", "wget -q --spider --proxy=off localhost:3000/health || exit 1"]
 
   nextcloud_cron:
-    image: nextcloud:22-fpm-alpine
+    image: nextcloud:24-fpm-alpine
     restart: always
     volumes:
       - nextcloud_src:/var/www/html