Update dependency rspec-sidekiq to v4.2.0 (#29964)

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

Gemfile.lock

@@ -640,7 +640,7 @@ GEM
       rspec-expectations (~> 3.13)
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
-    rspec-sidekiq (4.1.0)
+    rspec-sidekiq (4.2.0)
       rspec-core (~> 3.0)
       rspec-expectations (~> 3.0)
       rspec-mocks (~> 3.0)