core: bump django-pglock from 1.5.1 to 1.6.0 (#11058)

Bumps [django-pglock](https://github.com/Opus10/django-pglock) from 1.5.1 to 1.6.0.
- [Release notes](https://github.com/Opus10/django-pglock/releases)
- [Changelog](https://github.com/Opus10/django-pglock/blob/main/CHANGELOG.md)
- [Commits](Opus10/django-pglock@1.5.1...1.6.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>