Bump govuk_sidekiq from 9.0.3 to 9.0.4

Bumps [govuk_sidekiq](https://github.com/alphagov/govuk_sidekiq) from 9.0.3 to 9.0.4.
- [Changelog](https://github.com/alphagov/govuk_sidekiq/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk_sidekiq@v9.0.3...v9.0.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -265,7 +265,7 @@ GEM
     govuk_schemas (5.0.4)
       faker (~> 3.4.1)
       json-schema (>= 2.8, < 4.4)
-    govuk_sidekiq (9.0.3)
+    govuk_sidekiq (9.0.4)
       gds-api-adapters (>= 19.1.0)
       govuk_app_config (>= 1.1)
       redis-client (>= 0.22.2)
@@ -339,7 +339,7 @@ GEM
     mime-types (3.6.0)
       logger
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2024.1203)
+    mime-types-data (3.2025.0107)
     mini_mime (1.1.5)
     mini_portile2 (2.8.8)
     minitest (5.25.4)
@@ -679,7 +679,7 @@ GEM
     rbtree (0.4.6)
     rdoc (6.11.0)
       psych (>= 4.0.0)
-    redis-client (0.23.0)
+    redis-client (0.23.2)
       connection_pool
     regexp_parser (2.10.0)
     reline (0.6.0)
@@ -780,7 +780,8 @@ GEM
       sentry-ruby (~> 5.22.1)
       sidekiq (>= 3.0)
     set (1.1.0)
-    sidekiq (7.3.6)
+    sidekiq (7.3.8)
+      base64
       connection_pool (>= 2.3.0)
       logger
       rack (>= 2.2.4)