Bumps [xformers](https://github.com/facebookresearch/xformers) from 0.0.27.post2 to 0.0.28.post1. - [Release notes](https://github.com/facebookresearch/xformers/releases) - [Changelog](https://github.com/facebookresearch/xformers/blob/main/CHANGELOG.md) - [Commits](https://github.com/facebookresearch/xformers/compare/v0.0.27.post2...v0.0.28.post1) --- updated-dependencies: - dependency-name: xformers dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com>