DOC-4641 added redlock implementation to the list

Author: andy-stark-redis

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

@@ -56,6 +56,7 @@ already available that can be used for reference.
 * [ScarletLock](https://github.com/psibernetic/scarletlock) (C# .NET implementation with configurable datastore).
 * [Redlock4Net](https://github.com/LiZhenNet/Redlock4Net) (C# .NET implementation).
 * [node-redlock](https://github.com/mike-marcacci/node-redlock) (NodeJS implementation). Includes support for lock extension.
+* [simple-redis-mutex](https://github.com/AmrSaber/simple-redis-mutex) (Node.js implementation) Available as an [NPM package](https://www.npmjs.com/package/simple-redis-mutex).
 * [Deno DLM](https://github.com/oslabs-beta/Deno-Redlock) (Deno implementation)
 * [Rslock](https://github.com/hexcowboy/rslock) (Rust implementation). Includes async and lock extension support.