:arrow_up: Bump step-security/harden-runner from 2.14.2 to 2.15.0 (#5088)

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.14.2 to 2.15.0.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](https://github.com/step-security/harden-runner/compare/5ef0c079ce82195b2a36a210272d6b661572d83e...a90bcbc6539c36a85cdfeb73f7e2f433735f215b)

---
updated-dependencies:
- dependency-name: step-security/harden-runner
  dependency-version: 2.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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