chore(release): 1.6.0 [skip ci]

# [1.6.0](https://gitlab.com/to-be-continuous/gcloud/compare/1.5.2...1.6.0) (2022-01-10)

### Features

* Vault variant + non-blocking warning in case failed decoding [@url](https://gitlab.com/url)@ variable ([7e6123bc](https://gitlab.com/to-be-continuous/gcloud/commit/7e6123bc581335a15230d6f7d781d017675d3737))