Bump redis from 4.4.0 to 4.5.1 (#16868)

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>

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

Gemfile

@@ -72,7 +72,7 @@ gem 'rack-attack', '~> 6.5'
 gem 'rack-cors', '~> 1.1', require: 'rack/cors'
 gem 'rails-i18n', '~> 6.0'
 gem 'rails-settings-cached', '~> 0.6'
-gem 'redis', '~> 4.4', require: ['redis', 'redis/connection/hiredis']
+gem 'redis', '~> 4.5', require: ['redis', 'redis/connection/hiredis']
 gem 'mario-redis-lock', '~> 1.2', require: 'redis_lock'
 gem 'rqrcode', '~> 2.1'
 gem 'ruby-progressbar', '~> 1.11'