Bump rack from 3.2.0 to 3.2.3 in /examples/service

Bumps [rack](https://github.com/rack/rack) from 3.2.0 to 3.2.3.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v3.2.0...v3.2.3)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 3.2.3
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/service/gems.locked

@@ -80,7 +80,7 @@ GEM
       protocol-http (~> 0.43)
       rack (>= 1.0)
     protocol-redis (0.12.0)
-    rack (3.2.0)
+    rack (3.2.3)
     samovar (2.3.0)
       console (~> 1.0)
       mapping (~> 1.0)