docker-compose.yml: fix volume mount options

`z` is valid only for bindmounts

When using with volumes a warning for each volume appears:

netbox$ docker compose up
[+] Building 0.0s (0/0)
WARN[0000] mount of type `volume` should not define `bind` option
WARN[0000] mount of type `volume` should not define `bind` option
WARN[0000] mount of type `volume` should not define `bind` option

This may appear only when using a docker-compose.override.yml

docker-compose.yml

@@ -15,9 +15,9 @@ services:
       test: "curl -f http://localhost:8080/api/ || exit 1"
     volumes:
     - ./configuration:/etc/netbox/config:z,ro
-    - netbox-media-files:/opt/netbox/netbox/media:z,rw
-    - netbox-reports-files:/opt/netbox/netbox/reports:z,rw
-    - netbox-scripts-files:/opt/netbox/netbox/scripts:z,rw
+    - netbox-media-files:/opt/netbox/netbox/media:rw
+    - netbox-reports-files:/opt/netbox/netbox/reports:rw
+    - netbox-scripts-files:/opt/netbox/netbox/scripts:rw
   netbox-worker:
     <<: *netbox
     depends_on: