chore(deps): update dependency sidekiq to v8

Author: renovate[bot]

Gemfile

@@ -41,7 +41,7 @@ gem 'ruby-filemagic', '~> 0.7', '>= 0.7.3'
 gem 'rubyzip', '~> 2.4', '>= 2.4.1'
 gem 'sentry-raven', '~> 3.1', '>= 3.1.2'
 gem 'sepa_king', '~> 0.14'
-gem 'sidekiq', '~> 7.3', '>= 7.3.9'
+gem 'sidekiq', '~> 8.0', '>= 8.0.1'
 gem 'sidekiq-scheduler', '~> 5.0', '>= 5.0.6'
 gem 'slack-notifier', '~> 2.4'
 gem 'validates_timeliness', '~> 7.1.0'