Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.9.1 to 16.9.4. - [Release notes](https://github.com/microsoft/vstest/releases) - [Commits](https://github.com/microsoft/vstest/compare/v16.9.1...v16.9.4) Signed-off-by: dependabot[bot] <support@github.com>