Bump sinatra from 4.1.1 to 4.2.0 in /benchmarks

Bumps [sinatra](https://github.com/sinatra/sinatra) from 4.1.1 to 4.2.0.
- [Changelog](https://github.com/sinatra/sinatra/blob/main/CHANGELOG.md)
- [Commits](sinatra/sinatra@v4.1.1...v4.2.0)

---
updated-dependencies:
- dependency-name: sinatra
  dependency-version: 4.2.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

benchmarks/Gemfile.lock

@@ -42,7 +42,7 @@ GEM
     puma (6.6.1)
       nio4r (~> 2.0)
     rack (3.2.3)
-    rack-protection (4.1.1)
+    rack-protection (4.2.0)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
@@ -52,11 +52,11 @@ GEM
     regexp_parser (2.11.2)
     ruby2_keywords (0.0.5)
     simpleidn (0.2.3)
-    sinatra (4.1.1)
+    sinatra (4.2.0)
       logger (>= 1.6.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
-      rack-protection (= 4.1.1)
+      rack-protection (= 4.2.0)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
     tilt (2.6.1)