chore(deps): bump Microsoft.Windows.CsWinRT from 2.1.5 to 2.1.6

Bumps [Microsoft.Windows.CsWinRT](https://github.com/microsoft/cswinrt) from 2.1.5 to 2.1.6.
- [Release notes](https://github.com/microsoft/cswinrt/releases)
- [Changelog](https://github.com/microsoft/CsWinRT/blob/master/docs/breakingchanges-rc2.md)
- [Commits](https://github.com/microsoft/cswinrt/commits)

---
updated-dependencies:
- dependency-name: Microsoft.Windows.CsWinRT
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

SoundSwitch.Audio.Manager/SoundSwitch.Audio.Manager.csproj

@@ -11,7 +11,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.1.5" />
+    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.1.6" />
     <PackageReference Include="Serilog" Version="4.0.2" />
   </ItemGroup>
   <ItemGroup>