Bump xunit.runner.visualstudio in /exercises/binary-search-tree
Bump xunit.runner.visualstudio in /exercises/binary-search-tree

Bumps [xunit.runner.visualstudio](https://github.com/xunit/xunit) from 2.4.0 to 2.4.1.
- [Release notes](https://github.com/xunit/xunit/releases)
- [Commits](https://github.com/xunit/xunit/commits/2.4.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
robkeim/xcsharp,ErikSchierboom/xcsharp,exercism/xcsharp,exercism/xcsharp,robkeim/xcsharp,ErikSchierboom/xcsharp