Bump sinatra from 2.2.2 to 2.2.3

Bumps [sinatra](https://github.com/sinatra/sinatra) from 2.2.2 to 2.2.3.
- [Release notes](https://github.com/sinatra/sinatra/releases)
- [Changelog](https://github.com/sinatra/sinatra/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sinatra/sinatra/compare/v2.2.2...v2.2.3)

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

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

Gemfile.lock

@@ -19,22 +19,22 @@ GEM
       pry (~> 0.11)
       yard (~> 0.9.11)
     rack (2.2.4)
-    rack-protection (2.2.2)
+    rack-protection (2.2.3)
       rack
     ruby2_keywords (0.0.5)
     sequel (5.42.0)
     sequel_enum (0.2.0)
       sequel
-    sinatra (2.2.2)
+    sinatra (2.2.3)
       mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    sinatra-contrib (2.2.2)
+    sinatra-contrib (2.2.3)
       multi_json
       mustermann (~> 2.0)
-      rack-protection (= 2.2.2)
-      sinatra (= 2.2.2)
+      rack-protection (= 2.2.3)
+      sinatra (= 2.2.3)
       tilt (~> 2.0)
     sinatra-sequel (0.9.0)
       sequel (>= 3.2.0)