Bump github-buttons from 2.28.1 to 2.29.0

Bumps [github-buttons](https://github.com/buttons/github-buttons) from 2.28.1 to 2.29.0.
- [Commits](buttons/github-buttons@v2.28.1...v2.29.0)

---
updated-dependencies:
- dependency-name: github-buttons
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]