examples/compose: update image also for restarting containers

Signed-off-by: jj <log@riseup.net>

docs/examples/docker-compose.example.yml

@@ -59,6 +59,6 @@ services:
     watchtower:
         image: ghcr.io/containrrr/watchtower
         restart: unless-stopped
-        command: --cleanup --scope cobalt --interval 900
+        command: --cleanup --scope cobalt --interval 900 --include-restarting
         volumes:
             - /var/run/docker.sock:/var/run/docker.sock