Update InputKit.Maui to 6.0.312

Author: enisn

src/InputKit.Maui/InputKit.Maui.csproj

@@ -7,7 +7,7 @@
 		<RootNamespace>InputKit</RootNamespace>
     <UseMaui>true</UseMaui>
 		<SingleProject>true</SingleProject>
-		<MauiVersion>6.0.200-preview.14.5099</MauiVersion>
+		<MauiVersion>6.0.312</MauiVersion>
 		<PackageId>InputKit.Maui</PackageId>
 		<Version>4.0.0-pre.8</Version>
     <DefineConstants Condition="$(TargetFramework.Contains('-windows'))">$(DefineConstants);UWP</DefineConstants>