deps(deps): bump sinatra from 4.1.1 to 4.2.1

Bumps [sinatra](https://github.com/sinatra/sinatra) from 4.1.1 to 4.2.1.
- [Changelog](https://github.com/sinatra/sinatra/blob/main/CHANGELOG.md)
- [Commits](sinatra/sinatra@v4.1.1...v4.2.1)

---
updated-dependencies:
- dependency-name: sinatra
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -18,7 +18,7 @@ GEM
     lint_roller (1.1.0)
     logger (1.7.0)
     minitest (5.25.5)
-    mustermann (3.0.3)
+    mustermann (3.0.4)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.7.4)
     parallel (1.27.0)
@@ -30,8 +30,8 @@ GEM
     puma (7.0.1)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.16)
-    rack-protection (4.1.1)
+    rack (3.2.3)
+    rack-protection (4.2.1)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
@@ -67,11 +67,11 @@ GEM
       rubocop (>= 1.72.1)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
-    sinatra (4.1.1)
+    sinatra (4.2.1)
       logger (>= 1.6.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
-      rack-protection (= 4.1.1)
+      rack-protection (= 4.2.1)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
     thin (2.0.1)