Upgrade Sidekiq to version 6.5.12

This MR upgrades Sidekiq to version 6.5.12

Sidekiq:

https://github.com/sidekiq/sidekiq/blob/main/Changes.md#65101112

https://my.diffend.io/gems/sidekiq/6.4.0/6.5.12

Redis:

https://github.com/redis/redis-rb/blob/master/CHANGELOG.md#450

https://my.diffend.io/gems/redis/4.4.0/4.5.0