Bump sidekiq-unique-jobs from 6.0.8 to 6.0.9 (#10019)

Bumps [sidekiq-unique-jobs](https://github.com/mhenrixon/sidekiq-unique-jobs) from 6.0.8 to 6.0.9.
- [Release notes](https://github.com/mhenrixon/sidekiq-unique-jobs/releases)
- [Changelog](https://github.com/mhenrixon/sidekiq-unique-jobs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mhenrixon/sidekiq-unique-jobs/compare/v6.0.8...v6.0.9)

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

Gemfile.lock

@@ -563,7 +563,7 @@ GEM
       rufus-scheduler (~> 3.2)
       sidekiq (>= 3)
       tilt (>= 1.4.0)
-    sidekiq-unique-jobs (6.0.8)
+    sidekiq-unique-jobs (6.0.9)
       concurrent-ruby (~> 1.0, >= 1.0.5)
       sidekiq (>= 4.0, < 6.0)
       thor (~> 0)