Bump rack from 3.2.0 to 3.2.3 in /benchmarks/rack (#419)

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: direct:production
...

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

Author: dependabot[bot]

benchmarks/rack/Gemfile.lock

@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     cgi (0.5.0)
-    rack (3.2.0)
+    rack (3.2.3)
 
 PLATFORMS
   ruby
@@ -14,7 +14,7 @@ DEPENDENCIES
 
 CHECKSUMS
   cgi (0.5.0) sha256=fe99f65bb2c146e294372ebb27602adbc3b4c008e9ea7038c6bd48c1ec9759da
-  rack (3.2.0) sha256=79cd21514d696c59d61fae02e62900f087aac2d053fdc77d45f4e91b94fb3612
+  rack (3.2.3) sha256=239a373da6584574f25f042d8ed4ba21e691c9799f1d2b5c8920bbbc23ca3d41
 
 BUNDLED WITH
    4.0.0.dev