Bump redis from 4.4.0 to 4.5.1

Bumps [redis](https://github.com/redis/redis-rb) from 4.4.0 to 4.5.1.
- [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/v4.4.0...v4.5.1)

---
updated-dependencies:
- dependency-name: redis
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -27,7 +27,7 @@ gem 'stimulus-rails', '>= 0.4.0'
 gem 'jbuilder', '~> 2.7'
 
 # Use Redis adapter to run Action Cable in production
-gem 'redis', '~> 4.0'
+gem 'redis', '~> 4.5'
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]