build(deps): bump mustermann from 3.0.2 to 3.0.3 (#34562)

Bumps [mustermann](https://github.com/sinatra/mustermann) from 3.0.2 to 3.0.3.
- [Commits](https://github.com/sinatra/mustermann/compare/v3.0.2...v3.0.3)

---
updated-dependencies:
- dependency-name: mustermann
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -75,7 +75,7 @@ GEM
     logger (1.6.1)
     mercenary (0.4.0)
     multi_json (1.15.0)
-    mustermann (3.0.2)
+    mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.16.7-x86_64-linux)
       racc (~> 1.4)