Bump sinatra from 3.1.0 to 3.2.0

Bumps [sinatra](https://github.com/sinatra/sinatra) from 3.1.0 to 3.2.0.
- [Changelog](https://github.com/sinatra/sinatra/blob/main/CHANGELOG.md)
- [Commits](sinatra/sinatra@v3.1.0...v3.2.0)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -1,18 +1,20 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    base64 (0.2.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     rack (2.2.8)
-    rack-protection (3.1.0)
+    rack-protection (3.2.0)
+      base64 (>= 0.1.0)
       rack (~> 2.2, >= 2.2.4)
     ruby2_keywords (0.0.5)
-    sinatra (3.1.0)
+    sinatra (3.2.0)
       mustermann (~> 3.0)
       rack (~> 2.2, >= 2.2.4)
-      rack-protection (= 3.1.0)
+      rack-protection (= 3.2.0)
       tilt (~> 2.0)
-    tilt (2.2.0)
+    tilt (2.3.0)
 
 PLATFORMS
   ruby