chore(release): 3.9.0 [skip ci]

# [3.9.0](https://gitlab.com/to-be-continuous/testssl/compare/3.8.0...3.9.0) (2025-08-12)

### Features

* modular workflow rules ([d57d3eff](https://gitlab.com/to-be-continuous/testssl/commit/d57d3effdf6dae5f323a10eec18cbf28f19bab30))