build(deps-dev): Bump watchpack from 2.1.0 to 2.1.1 in /docs (#6063)

Bumps [watchpack](https://github.com/webpack/watchpack) from 2.1.0 to 2.1.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/webpack/watchpack/releases">watchpack's releases</a>.</em></p>
<blockquote>
<h2>v2.1.1</h2>
<h1>Bugfix</h1>
<ul>
<li>fix warnings with ENOENT when symlinks are resolved by watchpack</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="f1b5e2da2d"><code>f1b5e2d</code></a> 2.1.1</li>
<li><a href="cbfc11a8d7"><code>cbfc11a</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/webpack/watchpack/issues/188">#188</a> from Aghassi/fix/enoent-throwing</li>
<li><a href="7684df0846"><code>7684df0</code></a> fix: adds ENOENT for non windows errors</li>
<li>See full diff in <a href="https://github.com/webpack/watchpack/compare/v2.1.0...v2.1.1">compare view</a></li>
</ul>
</details>
<br />


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</details>

docs/package-lock.json

@@ -10193,9 +10193,9 @@
       }
     },
     "watchpack": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-2.1.0.tgz",
-      "integrity": "sha512-UjgD1mqjkG99+3lgG36at4wPnUXNvis2v1utwTgQ43C22c4LD71LsYMExdWXh4HZ+RmW+B0t1Vrg2GpXAkTOQw==",
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-2.1.1.tgz",
+      "integrity": "sha512-Oo7LXCmc1eE1AjyuSBmtC3+Wy4HcV8PxWh2kP6fOl8yTlNS7r0K9l1ao2lrrUza7V39Y3D/BbJgY8VeSlc5JKw==",
       "dev": true,
       "requires": {
         "glob-to-regexp": "^0.4.1",

docs/package.json

@@ -7,7 +7,7 @@
     "vuepress-theme-cosmos": "^1.0.180"
   },
   "devDependencies": {
-    "watchpack": "^2.1.0"
+    "watchpack": "^2.1.1"
   },
   "scripts": {
     "preserve": "./pre.sh",