chore(release): 7.4.2 [skip ci]

## [7.4.2](https://gitlab.com/to-be-continuous/docker/compare/7.4.1...7.4.2) (2025-09-08)

### Bug Fixes

* **cosign:** quote COSIGN_PRIVATE_KEY variable to prevent word splitting ([c2db5254](https://gitlab.com/to-be-continuous/docker/commit/c2db52549dff4b4836336e176f7a55e2016b81d8))