Link to .NET 9 MAUI API docs

Author: davidbritch

api/index.md

@@ -4,7 +4,7 @@ layout: ApiBrowserPage
 hide_bc: true
 title: .NET API browser
 quickFilterColumn1: net-9.0,netframework-4.8,netstandard-2.1
-quickFilterColumn2: aspnetcore-9.0,efcore-8.0,net-maui-8.0
+quickFilterColumn2: aspnetcore-9.0,efcore-8.0,net-maui-9.0
 quickFilterColumn3: azure-dotnet,ml-dotnet,spark-dotnet
 ms.topic: landing-page
 ms.custom: "updateeachrelease"