Bump rack from 2.0.9.1 to 2.1.4.1 in /docs (#294)

Bumps [rack](https://github.com/rack/rack) from 2.0.9.1 to 2.1.4.1.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.0.9.1...2.1.4.1)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: direct:production
...

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

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

docs/Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 gem 'nokogiri'
-gem 'rack', '~> 2.0.1'
+gem 'rack', '~> 2.1.4'
 gem 'rspec'
 
 gem "jekyll", "~> 4.2"

docs/Gemfile.lock

@@ -114,7 +114,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (4.0.7)
     racc (1.6.0)
-    rack (2.0.9.1)
+    rack (2.1.4.1)
     rake (13.0.6)
     rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
@@ -164,7 +164,7 @@ DEPENDENCIES
   jemoji (~> 0.12.0)
   just-the-docs (~> 0.3.3)
   nokogiri
-  rack (~> 2.0.1)
+  rack (~> 2.1.4)
   rspec
 
 BUNDLED WITH