correct failing link to "dummyurl"

Signed-off-by: Charlie Arehart <[email protected]>

Author: carehart

redis-cluster-application-example/README.md

@@ -1,6 +1,6 @@
 # README
 
-This repository contains sample code and scripts that accompany our [**Migrating from a Redis Cluster to a DragonflyDB on a single node**](https://dummyurl) tutorial.
+This repository contains sample code and scripts that accompany our [**Migrating from a Redis Cluster to a DragonflyDB on a single node**](https://www.dragonflydb.io/blog/migrating-from-a-redis-cluster-to-a-dragonfly-on-a-single-node) tutorial.
 
 In this tutorial, you learn how to migrate data from a Redis Cluster to a single-node DragonflyDB instance. You can use the sample application `/app` to demonstrate the migration process and cover everything step by step.