fix yamllinting error

Author: Mafyuh

docker/plex/docker-compose.yml

@@ -25,4 +25,4 @@ volumes:
     driver_opts:
       type: nfs
       o: addr=nas.lan,vers=4,ro
-      device: ":/mnt/thePool/thePoolShare/Media"
+      device: ":/mnt/thePool/thePoolShare/Media"