Add missing reference to M.E.AI.OpenAI (#6275)

Author: MackinnonBuck

src/ProjectTemplates/Microsoft.Extensions.AI.Templates/src/ChatWithCustomData/ChatWithCustomData-CSharp.Web/ChatWithCustomData-CSharp.Web.csproj.in

@@ -13,7 +13,7 @@
 #endif -->
 <!--#if (IsOllama)
     <PackageReference Include="OllamaSharp" Version="${OllamaSharpVersion}" />
-#elif (IsGHModels && !IsAspire)
+#elif ((IsGHModels || IsOpenAI) && !IsAspire)
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="${MicrosoftExtensionsAIVersion}" />
 #elif (IsAzureAiFoundry)
     <PackageReference Include="Azure.AI.Projects" Version="${AzureAIProjectsVersion}" />