chore(deps): update step-security/harden-runner action to v2.12.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
step-security/harden-runner	action	patch	v2.12.0 -> v2.12.1

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Release Notes

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

v2.12.1

Compare Source

What's Changed

• Detection capabilities have been upgraded to better recognize attempts at runner tampering. These improvements are informed by real-world incident learnings, including analysis of anomalous behaviors observed in the tj-actions and reviewdog supply chain attack.
• Resolved an issue where the block policy was not enforced correctly when the GitHub Actions job was running inside a container on a self-hosted VM runner.

Full Changelog: step-security/harden-runner@v2...v2.12.1

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