Bump step-security/harden-runner from 2.15.0 to 2.15.1 (#5100)

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](https://github.com/step-security/harden-runner/compare/a90bcbc6539c36a85cdfeb73f7e2f433735f215b...58077d3c7e43986b6b15fba718e8ea69e387dfcc)

---
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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