Bump sinatra from 4.0.0 to 4.1.0 in /examples/sinatra/app/src (#541)

Bumps [sinatra](https://github.com/sinatra/sinatra) from 4.0.0 to 4.1.0.
- [Changelog](https://github.com/sinatra/sinatra/blob/main/CHANGELOG.md)
- [Commits](sinatra/sinatra@v4.0.0...v4.1.0)

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

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

examples/sinatra/app/src/Gemfile

@@ -4,6 +4,6 @@ source "https://rubygems.org"
 
 # gem "rails"
 
-gem "sinatra", "~> 4.0"
+gem "sinatra", "~> 4.1"
 
 gem "rackup", "~> 2.1"

examples/sinatra/app/src/Gemfile.lock

@@ -2,25 +2,28 @@ GEM
   remote: https://rubygems.org/
   specs:
     base64 (0.2.0)
-    mustermann (3.0.0)
+    logger (1.6.1)
+    mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
-    rack (3.0.9.1)
-    rack-protection (4.0.0)
+    rack (3.1.8)
+    rack-protection (4.1.0)
       base64 (>= 0.1.0)
+      logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
     rack-session (2.0.0)
       rack (>= 3.0.0)
     rackup (2.1.0)
       rack (>= 3)
       webrick (~> 1.8)
     ruby2_keywords (0.0.5)
-    sinatra (4.0.0)
+    sinatra (4.1.0)
+      logger (>= 1.6.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
-      rack-protection (= 4.0.0)
+      rack-protection (= 4.1.0)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
-    tilt (2.3.0)
+    tilt (2.4.0)
     webrick (1.8.2)
 
 PLATFORMS
@@ -29,7 +32,7 @@ PLATFORMS
 
 DEPENDENCIES
   rackup (~> 2.1)
-  sinatra (~> 4.0)
+  sinatra (~> 4.1)
 
 BUNDLED WITH
    2.5.3