Bump sidekiq from 6.3.1 to 6.4.0

Bumps [sidekiq](https://github.com/mperham/sidekiq) from 6.3.1 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@v6.3.1...v6.4.0)

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

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

Gemfile.lock

@@ -235,7 +235,7 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
-    sidekiq (6.3.1)
+    sidekiq (6.4.0)
       connection_pool (>= 2.2.2)
       rack (~> 2.0)
       redis (>= 4.2.0)