Bumps [rack](https://github.com/rack/rack) from 2.1.2 to 2.2.3. - [Release notes](https://github.com/rack/rack/releases) - [Changelog](https://github.com/rack/rack/blob/master/CHANGELOG.md) - [Commits](https://github.com/rack/rack/compare/2.1.2...2.2.3) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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