chore(release): 7.3.0 [skip ci]

# [7.3.0](https://gitlab.com/to-be-continuous/docker/compare/7.2.1...7.3.0) (2025-08-25)

### Features

* multi-platform build with buildah manifest ([25cda525](https://gitlab.com/to-be-continuous/docker/commit/25cda5250318579cbcfcb32aabc24926962d0bf8))