Update transient WebView2 reference to 1.0.2730-prerelease

Author: Arlodotexe

MultiTarget/PackageReferences/WinAppSdk.props

@@ -2,6 +2,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.6.240807006-preview1" />
     <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22621.756" />
+    <PackageReference Include="Microsoft.Web.WebView2" Version="1.0.2730-prerelease" />
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.1.1" PrivateAssets="all" />