ci: build(deps): bump step-security/harden-runner from 2.15.0 to 2.15.1 (#777)

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.15.0 to 2.15.1.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@a90bcbc...58077d3)

---
updated-dependencies:
- dependency-name: step-security/harden-runner
  dependency-version: 2.15.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: github-actions