fix: bump Microsoft.Bcl.AsyncInterfaces to 10.0.6 to resolve Fable CI NU1605 downgrade warning

System.Threading.Channels 10.0.6 (resolved via Version="*") requires
Microsoft.Bcl.AsyncInterfaces >= 10.0.6, but the project pinned it at 10.0.5.
Fable's MSBuildCrackerResolver treats NU1605 (package downgrade) as a fatal
error, causing the Fable CI job to fail. Bumping to 10.0.6 resolves the conflict.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

src/FSharp.Control.AsyncSeq/FSharp.Control.AsyncSeq.fsproj

@@ -24,7 +24,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Update="FSharp.Core" Version="4.7.2" />
-    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="10.0.5" />
+    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="10.0.6" />
     <PackageReference Include="System.Threading.Channels" Version="*" />
     <Content Include="*.fsproj; **\*.fs; **\*.fsi;" PackagePath="fable\" />
   </ItemGroup>