add prereqs for aoai

Author: eric-urban

articles/ai-services/speech-service/includes/quickstarts/openai-speech/csharp.md

@@ -12,7 +12,7 @@ ms.author: eur
 
 ## Prerequisites
 
-[!INCLUDE [Prerequisites](../../common/azure-prerequisites.md)]
+[!INCLUDE [Prerequisites](../../common/azure-prerequisites-openai.md)]
 
 ## Set up the environment
 The Speech SDK is available as a [NuGet package](https://www.nuget.org/packages/Microsoft.CognitiveServices.Speech) and implements .NET Standard 2.0. You install the Speech SDK later in this guide, but first check the [SDK installation guide](../../../quickstarts/setup-platform.md?pivots=programming-language-csharp) for any more requirements.