Update NuGet packages for 2.1 release

Author: Sergio0694

samples/ComputeSharp.SwapChain.WinUI/ComputeSharp.SwapChain.WinUI.csproj

@@ -28,7 +28,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.3.230724000" />
+    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.4.230913002" />
     <PackageReference Include="CommunityToolkit.Diagnostics" Version="8.2.1" />
     <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.1" />
     <PackageReference Include="CommunityToolkit.WinUI.UI.Controls.Core" Version="7.1.2" />

src/ComputeSharp.D2D1.Uwp/ComputeSharp.D2D1.Uwp.csproj

@@ -25,7 +25,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Win2D.uwp" Version="1.27.0-preview3" />
+    <PackageReference Include="Win2D.uwp" Version="1.27.0" />
   </ItemGroup>
 
   <ItemGroup>

src/ComputeSharp.D2D1.WinUI/ComputeSharp.D2D1.WinUI.csproj

@@ -20,8 +20,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Graphics.Win2D" Version="1.1.0-preview1" />
-    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.3.230724000" />
+    <PackageReference Include="Microsoft.Graphics.Win2D" Version="1.1.0" />
+    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.4.230913002" />
   </ItemGroup>
 
   <ItemGroup>

src/ComputeSharp.WinUI/ComputeSharp.WinUI.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.3.230724000" />
+    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.4.230913002" />
   </ItemGroup>
 
   <ItemGroup>

tests/ComputeSharp.D2D1.WinUI.Tests/ComputeSharp.D2D1.WinUI.Tests.csproj

@@ -57,7 +57,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" ExcludeAssets="build" />
-    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.3.230724000" />
+    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.4.230913002" />
     <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22621.756" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />