Bump rack from 1.6.11 to 2.2.3

[dependabot[bot]]

Bumps rack from 1.6.11 to 2.2.3.

Commits

• 1741c58 bump version
• 5ccca47 When parsing cookies, only decode the values
• a5e80f0 Bump version.
• b0de37d Remove trailing whitespace.
• 1a784e5 Prepare CHANGELOG for next patch release.
• a0d57d4 Fix to handle same_site option for session pool
• a9b223b Ensure full match. Fixes #1590.
• f4c5645 Double assignment is still needed to prevent an "unused variable" warning
• 5c121dd Revert "Update Thin handler to better handle more options"
• 961d976 Prepare point release.
• Additional commits viewable in compare view

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