Bump sinatra from 2.0.8.1 to 2.1.0

Bumps [sinatra](https://github.com/sinatra/sinatra) from 2.0.8.1 to 2.1.0.
- [Release notes](https://github.com/sinatra/sinatra/releases)
- [Changelog](https://github.com/sinatra/sinatra/blob/master/CHANGELOG.md)
- [Commits](sinatra/sinatra@v2.0.8.1...v2.1.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Gemfile.lock

@@ -15,7 +15,6 @@ GEM
  zeitwerk (~> 2.3)
  addressable (2.7.0)
  public_suffix (>= 2.0.2, < 5.0)
- backports (3.18.1)
  builder (3.2.4)
  concurrent-ruby (1.1.7)
  cookiejar (0.3.3)
@@ -78,7 +77,7 @@ GEM
  public_suffix (4.0.5)
  racc (1.5.2)
  rack (2.2.3)
- rack-protection (2.0.8.1)
+ rack-protection (2.1.0)
  rack
  rack-test (1.1.0)
  rack (>= 1.0, < 3)
@@ -105,17 +104,16 @@ GEM
  json (>= 1.8, < 3)
  simplecov-html (~> 0.10.0)
  simplecov-html (0.10.2)
- sinatra (2.0.8.1)
+ sinatra (2.1.0)
  mustermann (~> 1.0)
- rack (~> 2.0)
- rack-protection (= 2.0.8.1)
+ rack (~> 2.2)
+ rack-protection (= 2.1.0)
  tilt (~> 2.0)
- sinatra-contrib (2.0.8.1)
- backports (>= 2.8.2)
+ sinatra-contrib (2.1.0)
  multi_json
  mustermann (~> 1.0)
- rack-protection (= 2.0.8.1)
- sinatra (= 2.0.8.1)
+ rack-protection (= 2.1.0)
+ sinatra (= 2.1.0)
  tilt (~> 2.0)
  sync (0.5.0)
  term-ansicolor (1.7.1)