[doc/distributed_locks] new ruby implementation

content/develop/use/patterns/distributed-locks.md

@@ -38,6 +38,7 @@ Before describing the algorithm, here are a few links to implementations
 already available that can be used for reference.
 
 * [Redlock-rb](https://github.com/antirez/redlock-rb) (Ruby implementation). There is also a [fork of Redlock-rb](https://github.com/leandromoreira/redlock-rb) that adds a gem for easy distribution.
+* [RedisQueuedLocks](https://github.com/0exp/redis_queued_locks) (Ruby implementation).
 * [Redlock-py](https://github.com/SPSCommerce/redlock-py) (Python implementation).
 * [Pottery](https://github.com/brainix/pottery#redlock) (Python implementation).
 * [Aioredlock](https://github.com/joanvila/aioredlock) (Asyncio Python implementation).