Bump govuk_app_config from 4.10.1 to 4.11.0

Bumps [govuk_app_config](https://github.com/alphagov/govuk_app_config) from 4.10.1 to 4.11.0.
- [Release notes](https://github.com/alphagov/govuk_app_config/releases)
- [Changelog](https://github.com/alphagov/govuk_app_config/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk_app_config@v4.10.1...v4.11.0)

---
updated-dependencies:
- dependency-name: govuk_app_config
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -122,9 +122,9 @@ GEM
     globalid (1.0.0)
       activesupport (>= 5.0)
     govuk_ab_testing (2.4.2)
-    govuk_app_config (4.10.1)
+    govuk_app_config (4.11.0)
       logstasher (~> 2.1)
-      plek (~> 4)
+      plek (>= 4, < 6)
       prometheus_exporter (~> 2.0)
       puma (>= 5.6, < 7.0)
       rack-proxy (~> 0.7)