Bump sidekiq from 6.2.1 to 6.4.0

Bumps [sidekiq](https://github.com/mperham/sidekiq) from 6.2.1 to 6.4.0.
- [Release notes](https://github.com/mperham/sidekiq/releases)
- [Changelog](https://github.com/mperham/sidekiq/blob/main/Changes.md)
- [Commits](sidekiq/sidekiq@v6.2.1...v6.4.0)

---
updated-dependencies:
- dependency-name: sidekiq
  dependency-type: direct:production
...

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

Gemfile

@@ -26,7 +26,7 @@ gem 'rack-cors', '~> 1.0.5', require: 'rack/cors'
 gem 'htmlentities'
 gem 'rack-attack', '~> 6.0.0'
 
-gem 'sidekiq', '~> 6.2.1'
+gem 'sidekiq', '~> 6.4.0'
 gem 'sidekiq-cron', '~> 1.1.0'
 
 gem 'airbrake', '~> 10.0.5'

Gemfile.lock

@@ -308,7 +308,10 @@ GEM
     rb-inotify (0.10.0)
       ffi (~> 1.0)
     rbtree3 (0.6.0)
-    redis (4.4.0)
+    redis (5.0.2)
+      redis-client (~> 0.7)
+    redis-client (0.7.1)
+      connection_pool
     regexp_parser (1.6.0)
     responders (3.0.0)
       actionpack (>= 5.0)
@@ -354,7 +357,7 @@ GEM
     scenic (1.5.1)
       activerecord (>= 4.0.0)
       railties (>= 4.0.0)
-    sidekiq (6.2.1)
+    sidekiq (6.4.0)
       connection_pool (>= 2.2.2)
       rack (~> 2.0)
       redis (>= 4.2.0)
@@ -446,7 +449,7 @@ DEPENDENCIES
   rspec-rails
   sassc-rails (~> 2.1.2)
   scenic (~> 1.5.1)
-  sidekiq (~> 6.2.1)
+  sidekiq (~> 6.4.0)
   sidekiq-cron (~> 1.1.0)
   simplecov
   simplecov-lcov