Bump govuk_sidekiq from 4.0.0 to 5.0.0
Bump govuk_sidekiq from 4.0.0 to 5.0.0

Bumps [govuk_sidekiq](https://github.com/alphagov/govuk_sidekiq) from 4.0.0 to 5.0.0.
- [Release notes](https://github.com/alphagov/govuk_sidekiq/releases)
- [Changelog](https://github.com/alphagov/govuk_sidekiq/blob/master/CHANGELOG.md)
- [Commits](https://github.com/alphagov/govuk_sidekiq/compare/v4.0.0...v5.0.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
alphagov/publishing-api,alphagov/publishing-api