Bump sinatra in /code-samples/serving/hello-world/helloworld-ruby (#6160)

Bumps [sinatra](https://github.com/sinatra/sinatra) from 2.2.3 to 4.1.0.
- [Changelog](https://github.com/sinatra/sinatra/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sinatra/sinatra/compare/v2.2.3...v4.1.0)

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

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

code-samples/serving/hello-world/helloworld-ruby/Gemfile.lock

@@ -1,18 +1,26 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    mustermann (2.0.2)
+    base64 (0.2.0)
+    logger (1.6.1)
+    mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.8.1)
+    rack (3.1.8)
-    rack-protection (2.2.3)
+    rack-protection (4.1.0)
-      rack
+      base64 (>= 0.1.0)
+      logger (>= 1.6.0)
+      rack (>= 3.0.0, < 4)
+    rack-session (2.0.0)
+      rack (>= 3.0.0)
     ruby2_keywords (0.0.5)
-    sinatra (2.2.3)
+    sinatra (4.1.0)
-      mustermann (~> 2.0)
+      logger (>= 1.6.0)
-      rack (~> 2.2)
+      mustermann (~> 3.0)
-      rack-protection (= 2.2.3)
+      rack (>= 3.0.0, < 4)
+      rack-protection (= 4.1.0)
+      rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
-    tilt (2.0.11)
+    tilt (2.4.0)
 
 PLATFORMS
   ruby