Bump zstandard from 0.14.1 to 0.15.1 (#2062)

Bumps [zstandard](https://github.com/indygreg/python-zstandard) from 0.14.1 to 0.15.1.
- [Release notes](https://github.com/indygreg/python-zstandard/releases)
- [Changelog](https://github.com/indygreg/python-zstandard/blob/main/docs/news.rst)
- [Commits](https://github.com/indygreg/python-zstandard/compare/0.14.1...0.15.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -26,4 +26,4 @@ taskcluster==38.0.6
 tenacity==6.3.1
 tqdm==4.54.1
 xgboost==1.2.1
-zstandard==0.14.1
+zstandard==0.15.1