Bump Microsoft.NET.Test.Sdk from 16.10.0 to 16.11.0 in /src/csharp

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.10.0 to 16.11.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v16.10.0...v16.11.0)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

src/csharp/Intel/Iced.UnitTests/Iced.UnitTests.csproj

@@ -14,7 +14,7 @@
   <ItemGroup>
     <PackageReference Include="coverlet.msbuild" Version="3.1.0" />
     <!-- NOTE: when updating this thing, make sure it hasn't gotten slower (it's happened twice now!) -->
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.11.0" />
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.2" PrivateAssets="All" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.console" Version="2.4.1" />