Bump redis from 4.1.4 to 4.2.1 (#8646)

* Bump redis from 4.1.4 to 4.2.1

Bumps [redis](https://github.com/redis/redis-rb) from 4.1.4 to 4.2.1.
- [Release notes](https://github.com/redis/redis-rb/releases)
- [Changelog](https://github.com/redis/redis-rb/blob/master/CHANGELOG.md)
- [Commits](https://github.com/redis/redis-rb/compare/v4.1.4...v4.2.1)

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

* Bump redis from 4.1.4 to 4.2.1 (Update vendor/cache)

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Gemfile

@@ -82,7 +82,7 @@ gem "rails-settings-cached", ">= 2.1.1" # Settings plugin for Rails that makes m
 gem "ransack", "~> 2.3" # Searching and sorting
 gem "recaptcha", "~> 5.5", require: "recaptcha/rails" # Helpers for the reCAPTCHA API
 gem "redcarpet", "~> 3.5" # A fast, safe and extensible Markdown to (X)HTML parser
-gem "redis", "~> 4.1.4" # Redis ruby client
+gem "redis", "~> 4.2.1" # Redis ruby client
 gem "redis-rails", "~> 5.0.2" # Redis for Ruby on Rails
 gem "reverse_markdown", "~> 2.0" # Map simple html back into markdown
 gem "rolify", "~> 5.3" # Very simple Roles library

Gemfile.lock

@@ -627,7 +627,7 @@ GEM
     recaptcha (5.5.0)
       json
     redcarpet (3.5.0)
-    redis (4.1.4)
+    redis (4.2.1)
     redis-actionpack (5.1.0)
       actionpack (>= 4.0, < 7)
       redis-rack (>= 1, < 3)
@@ -970,7 +970,7 @@ DEPENDENCIES
   ransack (~> 2.3)
   recaptcha (~> 5.5)
   redcarpet (~> 3.5)
-  redis (~> 4.1.4)
+  redis (~> 4.2.1)
   redis-rails (~> 5.0.2)
   reverse_markdown (~> 2.0)
   rolify (~> 5.3)