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] <[email protected]>

Gemfile.lock

@@ -8,6 +8,7 @@ GEM
  rspec-expectations (~> 3.4)
  thor (~> 1.0)
  backports (3.24.1)
+ base64 (0.2.0)
  builder (3.2.4)
  childprocess (4.1.0)
  contracts (0.16.1)
@@ -34,17 +35,18 @@ GEM
  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)
  rspec-expectations (3.12.3)
  diff-lcs (>= 1.2.0, < 2.0)
  rspec-support (~> 3.12.0)
  rspec-support (3.12.1)
  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)
  thor (1.2.2)
  tilt (2.3.0)