Release 3.15.0

We now only include the version in the release title, with the date below it. Because of this, need to adjust the script to understand the underlines that define the title are now shorter.

It was removed by accident in #528 after running `pyupgrade --py39-plus`.

Fix #530

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.12.11 → v0.12.12](astral-sh/ruff-pre-commit@v0.12.11...v0.12.12)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Bumps the github-actions group with 1 update: [actions/setup-python](https://github.com/actions/setup-python).


Updates `actions/setup-python` from 5 to 6
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Fixes #534

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.12.12 → v0.13.0](astral-sh/ruff-pre-commit@v0.12.12...v0.13.0)
- [github.com/pre-commit/mirrors-mypy: v1.17.1 → v1.18.1](pre-commit/mirrors-mypy@v1.17.1...v1.18.1)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Fixes #529

---------

Co-authored-by: Bruno Oliveira <bruno@soliv.dev>