Bump step-security/harden-runner from 2.15.1 to 2.16.0 (#1651)

Bumps
[step-security/harden-runner](https://github.com/step-security/harden-runner)
from 2.15.1 to 2.16.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/step-security/harden-runner/releases">step-security/harden-runner's
releases</a>.</em></p>
<blockquote>
<h2>v2.16.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Updated action.yml to use node24</li>
<li>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 <a
href="https://github.com/step-security/harden-runner/security/advisories/GHSA-46g3-37rh-v698">GHSA-46g3-37rh-v698</a>
for details.</li>
<li>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 <a
href="https://github.com/step-security/harden-runner/security/advisories/GHSA-g699-3x6g-wm3g">GHSA-g699-3x6g-wm3g</a>
for details.</li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/step-security/harden-runner/compare/v2.15.1...v2.16.0">https://github.com/step-security/harden-runner/compare/v2.15.1...v2.16.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/step-security/harden-runner/commit/fa2e9d605c4eeb9fcad4c99c224cee0c6c7f3594"><code>fa2e9d6</code></a>
Release v2.16.0 (<a
href="https://redirect.github.com/step-security/harden-runner/issues/646">#646</a>)</li>
<li>See full diff in <a
href="https://github.com/step-security/harden-runner/compare/58077d3c7e43986b6b15fba718e8ea69e387dfcc...fa2e9d605c4eeb9fcad4c99c224cee0c6c7f3594">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/push_gem.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@58077d3c7e43986b6b15fba718e8ea69e387dfcc # v2.15.1
+        uses: step-security/harden-runner@fa2e9d605c4eeb9fcad4c99c224cee0c6c7f3594 # v2.16.0
         with:
           egress-policy: audit