fix(deps): bump rack from 2.2.6.2 to 2.2.6.3 in /pact_broker (#115)

Bumps [rack](https://github.com/rack/rack) from 2.2.6.2 to 2.2.6.3.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.6.2...v2.2.6.3)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
...

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

Author: dependabot[bot]

Diff for: pact_broker/Gemfile.lock

@@ -106,7 +106,7 @@ GEM
     puma (5.6.5)
       nio4r (~> 2.0)
     racc (1.6.2)
-    rack (2.2.6.2)
+    rack (2.2.6.3)
     rack-protection (2.2.4)
       rack
     rainbow (3.1.1)