Fix code block indentation

Author: v-dirichards

articles/azure-cache-for-redis/cache-web-app-aspnet-core-howto.md

@@ -67,10 +67,10 @@ dotnet add package Microsoft.Azure.StackExchangeRedis
 
 1. Include the libraries in your code
 
-       ```csharp
-       using Azure.Identity;
-       using StackExchange.Redis
-       ```
+   ```csharp
+   using Azure.Identity;
+   using StackExchange.Redis
+   ```
 
 1. Using the default Azure credentials to authenticate the client connection. This enables your code to use the signed-in user credential when running locally, and an Azure managed identity when running in Azure without code change.