Bump sidekiq from 5.2.3 to 5.2.5 (#9765)

Bumps [sidekiq](https://github.com/mperham/sidekiq) from 5.2.3 to 5.2.5.
- [Release notes](https://github.com/mperham/sidekiq/releases)
- [Changelog](https://github.com/mperham/sidekiq/blob/master/Changes.md)
- [Commits](https://github.com/mperham/sidekiq/compare/v5.2.3...v5.2.5)

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

Gemfile.lock

@@ -427,7 +427,7 @@ GEM
     rack-attack (5.4.2)
       rack (>= 1.0, < 3)
     rack-cors (1.0.2)
-    rack-protection (2.0.4)
+    rack-protection (2.0.5)
       rack
     rack-proxy (0.6.4)
       rack
@@ -551,8 +551,9 @@ GEM
     scss_lint (0.57.1)
       rake (>= 0.9, < 13)
       sass (~> 3.5, >= 3.5.5)
-    sidekiq (5.2.3)
+    sidekiq (5.2.5)
       connection_pool (~> 2.2, >= 2.2.2)
+      rack (>= 1.5.0)
       rack-protection (>= 1.5.0)
       redis (>= 3.3.5, < 5)
     sidekiq-bulk (0.2.0)