fixing typo

Author: lisaguthrie

articles/azure-app-configuration/enable-dynamic-configuration-aspnet-core.md

@@ -117,7 +117,7 @@ A *sentinel key* is a special key used to signal when configuration has changed.
     > [!NOTE]
     > For testing purposes, you may want to lower the cache expiration time.
 
-    To actually trigger a refresh operation, you'll need to configure a refresh middleware for the application to refresh the configuration data when any change occurs. You'll see how to do this in step #4.
+    To actually trigger a refresh operation, you'll need to configure a refresh middleware for the application to refresh the configuration data when any change occurs. You'll see how to do this in a later step.
 
 2. Add a *Settings.cs* file that defines and implements a new `Settings` class.