Bump rack-session from 2.1.1 to 2.1.2

Bumps [rack-session](https://github.com/rack/rack-session) from 2.1.1 to 2.1.2.
- [Release notes](https://github.com/rack/rack-session/releases)
- [Changelog](https://github.com/rack/rack-session/blob/main/releases.md)
- [Commits](https://github.com/rack/rack-session/compare/v2.1.1...v2.1.2)

---
updated-dependencies:
- dependency-name: rack-session
  dependency-version: 2.1.2
  dependency-type: indirect
...

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

Gemfile.lock

@@ -207,8 +207,8 @@ GEM
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)
-    rack (3.2.4)
-    rack-session (2.1.1)
+    rack (3.2.6)
+    rack-session (2.1.2)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rack-test (2.2.0)