Bump CsWinRT

Author: Arlodotexe

MultiTarget/PackageReferences/Uwp.props

@@ -1,6 +1,6 @@
 <Project>
   <ItemGroup>
     <PackageReference Condition="'$(HasWinUI)' == 'true'" Include="Microsoft.UI.Xaml" Version="2.8.7-prerelease.240725004" />
-    <PackageReference Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'" Include="Microsoft.Windows.CsWinRT" Version="2.1.0-prerelease.240722.1" PrivateAssets="all" />
+    <PackageReference Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'" Include="Microsoft.Windows.CsWinRT" Version="2.1.0-prerelease-ci.240731.2" PrivateAssets="all" />
   </ItemGroup>
 </Project>

MultiTarget/PackageReferences/WinAppSdk.props

@@ -4,6 +4,6 @@
     <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22621.756" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.1.0-prerelease.240722.1" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.1.0-prerelease-ci.240731.2" PrivateAssets="all" />
   </ItemGroup>
 </Project>