chore(deps): bump step-security/harden-runner from 2.20.1 to 2.21.0 in the github-actions group across 1 directory (#799)

Bumps the github-actions group with 1 update in the / directory:
[step-security/harden-runner](https://github.com/step-security/harden-runner).

Updates `step-security/harden-runner` from 2.20.1 to 2.21.0
<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>v2.21.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Support for denied endpoints in block mode. This is included in the
enterprise tier. Customers can deny outbound calls, for example, to
public package registries.</li>
<li>Improved Support for AWS CodeBuild GitHub Actions Runners.</li>
<li>Bug fixes.</li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/step-security/harden-runner/compare/v2.20.1...v2.21.0">https://github.com/step-security/harden-runner/compare/v2.20.1...v2.21.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/step-security/harden-runner/commit/05e31511f85b41b11d1cf0ef85d0992719546e2c"><code>05e3151</code></a>
Merge pull request <a
href="https://redirect.github.com/step-security/harden-runner/issues/684">#684</a>
from step-security/rc-42</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/0f37afa338f57c61ee3dfc274daca8834963d83e"><code>0f37afa</code></a>
fix: ignore denied-endpoints on non-enterprise tier</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/93b58ee491c5b6cf3a5324966fca2908f8d447f3"><code>93b58ee</code></a>
fix: resolve cache host read-first and never downgrade egress
policy</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/e7399dd3e93d6c159d314af54b4704bc48abf6bc"><code>e7399dd</code></a>
fix: align deny-list mode detection with agent and log when both
endpoint inp...</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/c16689f716a10cdfd9cfe22e63938b8c6c0657de"><code>c16689f</code></a>
test: add denied_endpoints to Configuration fixtures and cover deny-list
merge</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/40b99cf0c7161e4dcdc6c5508927188b65028df9"><code>40b99cf</code></a>
Merge pull request <a
href="https://redirect.github.com/step-security/harden-runner/issues/682">#682</a>
from rohan-stepsecurity/rp/feat/codebuild-self-v2</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/fedec027a205365a7d64001a81931e4c36a1af6e"><code>fedec02</code></a>
Merge branch 'rc-42' into rp/feat/codebuild-self-v2</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/5361fb178b926b2be6df52e11ee257823821567b"><code>5361fb1</code></a>
feat: add build artifacts</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/286474fffe0b8fe7c9db855f132d04a9b48ab564"><code>286474f</code></a>
feat: Support Bravo agent install on CodeBuild runners</li>
<li><a
href="https://github.com/step-security/harden-runner/commit/051ec05283d064bd82f41279db4f70f0717bf778"><code>051ec05</code></a>
Merge pull request <a
href="https://redirect.github.com/step-security/harden-runner/issues/683">#683</a>
from h0x0er/jatin/deny-list</li>
<li>Additional commits viewable in <a
href="https://github.com/step-security/harden-runner/compare/b09bb98e06d4d774595224525879c09bc6e98c40...05e31511f85b41b11d1cf0ef85d0992719546e2c">compare
view</a></li>
</ul>
</details>
<br />

Author: CybotTM

.github/workflows/verify-release.yml

@@ -54,7 +54,7 @@ jobs:
       image: ${{ steps.resolve.outputs.image }}
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit