fix capitalization on program.cs

Author: amerjusupovic

articles/azure-app-configuration/howto-create-snapshots.md

@@ -94,7 +94,7 @@ If you have an application using Azure App Configuration, you can update it with
 
 ### [.NET](#tab/dotnet)
 
-Edit the call to the `AddAzureAppConfiguration` method, which is often found in the `program.cs` file of your application. If you don't have an application, you can reference any of the .NET quickstart guides, like [creating an ASP.NET core app with Azure App Configuration](./quickstart-aspnet-core-app.md).
+Edit the call to the `AddAzureAppConfiguration` method, which is often found in the `Program.cs` file of your application. If you don't have an application, you can reference any of the .NET quickstart guides, like [creating an ASP.NET core app with Azure App Configuration](./quickstart-aspnet-core-app.md).
 
 **Add snapshots to your configuration**