build(deps): bump postcss from 7.0.35 to 7.0.36 in /docs (#9525)

Bumps [postcss](https://github.com/postcss/postcss) from 7.0.35 to 7.0.36.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/postcss/postcss/releases">postcss's releases</a>.</em></p>
<blockquote>
<h2>7.0.36</h2>
<ul>
<li>Backport ReDoS vulnerabilities from PostCSS 8.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/postcss/postcss/blob/main/CHANGELOG.md">postcss's changelog</a>.</em></p>
<blockquote>
<h2>7.0.36</h2>
<ul>
<li>Backport ReDoS vulnerabilities from PostCSS 8.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="67e3d7b340"><code>67e3d7b</code></a> Release 7.0.36 version</li>
<li><a href="54cbf3c484"><code>54cbf3c</code></a> Backport ReDoS vulnerabilities from PostCSS 8</li>
<li>See full diff in <a href="https://github.com/postcss/postcss/compare/7.0.35...7.0.36">compare view</a></li>
</ul>
</details>
<br />


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</details>

docs/package-lock.json

@@ -6929,9 +6929,9 @@
       "integrity": "sha1-AerA/jta9xoqbAL+q7jB/vfgDqs="
     },
     "postcss": {
-      "version": "7.0.35",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.35.tgz",
-      "integrity": "sha512-3QT8bBJeX/S5zKTTjTCIjRF3If4avAT6kqxcASlTWEtAFCb9NH0OUxNDfgZSWdP5fJnBYCMEWkIFfWeugjzYMg==",
+      "version": "7.0.36",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.36.tgz",
+      "integrity": "sha512-BebJSIUMwJHRH0HAQoxN4u1CN86glsrwsW0q7T+/m44eXOUAxSNdHRkNZPYz5vVUbg17hFgOQDE7fZk7li3pZw==",
       "requires": {
         "chalk": "^2.4.2",
         "source-map": "^0.6.1",