chore(deps): update step-security/harden-runner action to v2.16.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
step-security/harden-runner	action	minor	v2.15.1 → v2.16.0

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Release Notes

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

v2.16.0

Compare Source

What's Changed

• Updated action.yml to use node24
• Security fix: Fixed a medium severity vulnerability where the egress block policy could be bypassed via DNS over HTTPS (DoH) by proxying DNS queries through a permitted resolver, allowing data exfiltration even with a restrictive allowed-endpoints list. This issue only affects the Community Tier; the Enterprise Tier is not affected. See GHSA-46g3-37rh-v698 for details.
• Security fix: Fixed a medium severity vulnerability where the egress block policy could be bypassed via DNS queries over TCP to external resolvers, allowing outbound network communication that evades configured network restrictions. This issue only affects the Community Tier; the Enterprise Tier is not affected. See GHSA-g699-3x6g-wm3g for details.

Full Changelog: step-security/harden-runner@v2.15.1...v2.16.0

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