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>

Author: dependabot[bot]

Gemfile.lock

@@ -425,7 +425,7 @@ GEM
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    redis (4.3.1)
+    redis (4.5.1)
     redis-namespace (1.8.1)
       redis (>= 3.0.4)
     regexp_parser (2.1.1)
@@ -508,7 +508,7 @@ GEM
     shellany (0.0.1)
     shoulda-matchers (4.5.1)
       activesupport (>= 4.2.0)
-    sidekiq (6.2.1)
+    sidekiq (6.4.0)
       connection_pool (>= 2.2.2)
       rack (~> 2.0)
       redis (>= 4.2.0)