Update step-security/harden-runner action to v2.8.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
step-security/harden-runner	action	minor	v2.7.1 -> v2.8.1

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[!WARNING] Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

step-security/harden-runner (step-security/harden-runner)

### [`v2.8.1`](https://togithub.com/step-security/harden-runner/releases/tag/v2.8.1) [Compare Source](https://togithub.com/step-security/harden-runner/compare/v2.8.0...v2.8.1) ##### What's Changed - Bug fix: Update isGitHubHosted implementation by [@​varunsh-coder](https://togithub.com/varunsh-coder) in [https://github.com/step-security/harden-runner/pull/425](https://togithub.com/step-security/harden-runner/pull/425) The previous implementation incorrectly identified large GitHub-hosted runners as self-hosted runners. As a result, harden-runner was not executing on these large GitHub-hosted runners. **Full Changelog**: https://github.com/step-security/harden-runner/compare/v2...v2.8.1 ### [`v2.8.0`](https://togithub.com/step-security/harden-runner/releases/tag/v2.8.0) [Compare Source](https://togithub.com/step-security/harden-runner/compare/v2.7.1...v2.8.0) ##### What's Changed Release v2.8.0 by [@​h0x0er](https://togithub.com/h0x0er) and [@​varunsh-coder](https://togithub.com/varunsh-coder) in [https://github.com/step-security/harden-runner/pull/416](https://togithub.com/step-security/harden-runner/pull/416) This release includes: - File Monitoring Enhancements: Adds the capability to view the name and path of every file written during the build process. - Process Tracking Enhancements: Adds the capability to view process names and arguments of processes run during the build process. These enhancements are based on insights from the XZ Utils incident, aimed at improving observability and detections during the build process. **Full Changelog**: https://github.com/step-security/harden-runner/compare/v2...v2.8.0

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