Update cache-best-practices.md

Added best practices for HiRedisCLuster

Author: carldc

articles/azure-cache-for-redis/cache-best-practices.md

@@ -53,6 +53,7 @@ There are several things related to memory usage within your Redis server instan
  * [Jedis (Java)](https://gist.github.com/JonCole/925630df72be1351b21440625ff2671f#file-redis-bestpractices-java-jedis-md)
  * [Node.js](https://gist.github.com/JonCole/925630df72be1351b21440625ff2671f#file-redis-bestpractices-node-js-md)
  * [PHP](https://gist.github.com/JonCole/925630df72be1351b21440625ff2671f#file-redis-bestpractices-php-md)
+ * [HiRedisCluster](https://github.com/Azure/AzureCacheForRedis/blob/main/HiRedisCluster%20Best%20Practices.md)
  * [ASP.NET Session State Provider](https://gist.github.com/JonCole/925630df72be1351b21440625ff2671f#file-redis-bestpractices-session-state-provider-md)