Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.8.3 to 16.9.1. - [Release notes](https://github.com/microsoft/vstest/releases) - [Commits](https://github.com/microsoft/vstest/compare/v16.8.3...v16.9.1) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>