chore(release): 6.0.0 [skip ci]

# [6.0.0](https://gitlab.com/to-be-continuous/gcloud/compare/5.5.0...6.0.0) (2025-08-13)

* feat(vault)!: enable certificate verification ([0fa96a69](https://gitlab.com/to-be-continuous/gcloud/commit/0fa96a69739eecde16dc9e17f5fd57f7aac13691))

### BREAKING CHANGES

* self-signed certificates must be declared in your GitLab DEFAULT_CA_CERTS or with VAULT_CA_CERTS variable