chore(deps): absorb 2025-05 dependabot GitHub Actions updates (#283)

* Bump gitleaks/gitleaks-action from 2.3.7 to 2.3.9 (#282)

Bumps [gitleaks/gitleaks-action](https://github.com/gitleaks/gitleaks-action) from 2.3.7 to 2.3.9.
- [Release notes](https://github.com/gitleaks/gitleaks-action/releases)
- [Commits](gitleaks/gitleaks-action@83373cf...ff98106)

---
updated-dependencies:
- dependency-name: gitleaks/gitleaks-action
  dependency-version: 2.3.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

* Bump docker/build-push-action from 6.15.0 to 6.16.0 (#281)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.15.0 to 6.16.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@471d1dc...14487ce)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 6.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Maud <110405507+mushroomempires@users.noreply.github.com>

Author: 3 people