Update dependency sidekiq-scheduler to v6 (#35596)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Gemfile

@@ -84,7 +84,7 @@ gem 'sanitize', '~> 7.0'
 gem 'scenic', '~> 1.7'
 gem 'sidekiq', '< 8'
 gem 'sidekiq-bulk', '~> 0.2.0'
-gem 'sidekiq-scheduler', '~> 5.0'
+gem 'sidekiq-scheduler', '~> 6.0'
 gem 'sidekiq-unique-jobs', '> 8'
 gem 'simple_form', '~> 5.2'
 gem 'simple-navigation', '~> 4.4'

Gemfile.lock

@@ -833,10 +833,9 @@ GEM
       redis-client (>= 0.22.2)
     sidekiq-bulk (0.2.0)
       sidekiq
-    sidekiq-scheduler (5.0.6)
+    sidekiq-scheduler (6.0.1)
       rufus-scheduler (~> 3.2)
-      sidekiq (>= 6, < 8)
-      tilt (>= 1.4.0, < 3)
+      sidekiq (>= 7.3, < 9)
     sidekiq-unique-jobs (8.0.11)
       concurrent-ruby (~> 1.0, >= 1.0.5)
       sidekiq (>= 7.0.0, < 9.0.0)
@@ -1082,7 +1081,7 @@ DEPENDENCIES
   shoulda-matchers
   sidekiq (< 8)
   sidekiq-bulk (~> 0.2.0)
-  sidekiq-scheduler (~> 5.0)
+  sidekiq-scheduler (~> 6.0)
   sidekiq-unique-jobs (> 8)
   simple-navigation (~> 4.4)
   simple_form (~> 5.2)