chore: update step-security/harden-runner action to v2.19.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
step-security/harden-runner	action	patch	v2.19.3 → v2.19.4

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Release Notes

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

v2.19.4

Compare Source

What's Changed

• Improvements for HTTPS Monitoring for the Enterprise tier of Harden Runner

Full Changelog: step-security/harden-runner@v2.19.3...v2.19.4

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.48%. Comparing base (8569081) to head (e3047a0).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #124   +/-   ##
=======================================
  Coverage   94.48%   94.48%           
=======================================
  Files          18       18           
  Lines        1323     1323           
=======================================
  Hits         1250     1250           
  Misses         37       37           
  Partials       36       36           

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