build(deps): bump rack-session from 2.0.0 to 2.1.0 (#36750)

Bumps [rack-session](https://github.com/rack/rack-session) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/rack/rack-session/releases)
- [Changelog](https://github.com/rack/rack-session/blob/v2.1.0/releases.md)
- [Commits](https://github.com/rack/rack-session/compare/v2.0.0...v2.1.0)

---
updated-dependencies:
- dependency-name: rack-session
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -99,7 +99,8 @@ GEM
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
-    rack-session (2.0.0)
+    rack-session (2.1.0)
+      base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rackup (2.2.1)
       rack (>= 3)