build(deps): bump plek from 4.1.0 to 5.0.0
build(deps): bump plek from 4.1.0 to 5.0.0

Bumps [plek](https://github.com/alphagov/plek) from 4.1.0 to 5.0.0.
- [Release notes](https://github.com/alphagov/plek/releases)
- [Changelog](https://github.com/alphagov/plek/blob/main/CHANGELOG.md)
- [Commits](https://github.com/alphagov/plek/compare/v4.1.0...v5.0.0)

---
updated-dependencies:
- dependency-name: plek
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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