Bump sidekiq from 7.3.7 to 7.3.9 (#3719)

Bumps [sidekiq](https://github.com/sidekiq/sidekiq) from 7.3.7 to 7.3.9.
- [Changelog](https://github.com/sidekiq/sidekiq/blob/main/Changes.md)
- [Commits](sidekiq/sidekiq@v7.3.7...v7.3.9)

---
updated-dependencies:
- dependency-name: sidekiq
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -481,7 +481,7 @@ GEM
       psych (>= 4.0.0)
     redcarpet (3.6.0)
     redis (4.8.1)
-    redis-client (0.23.1)
+    redis-client (0.23.2)
       connection_pool
     regexp_parser (2.10.0)
     reline (0.6.0)
@@ -552,7 +552,8 @@ GEM
       websocket (~> 1.0)
     shoulda-matchers (6.4.0)
       activesupport (>= 5.2.0)
-    sidekiq (7.3.7)
+    sidekiq (7.3.9)
+      base64
       connection_pool (>= 2.3.0)
       logger
       rack (>= 2.2.4)