Bump sass from 1.88.0 to 1.89.0 (plfa#1113)

Bumps [sass](https://github.com/sass/dart-sass) from 1.88.0 to 1.89.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/sass/dart-sass/releases">sass's
releases</a>.</em></p>
<blockquote>
<h2>Dart Sass 1.89.0</h2>
<p>To install Sass 1.89.0, download one of the packages below and <a
href="https://katiek2.github.io/path-doc/">add it to your PATH</a>, or
see <a href="https://sass-lang.com/install">the Sass website</a> for
full installation instructions.</p>
<h1>Changes</h1>
<ul>
<li>Allow the Node package importer to load files even when there are
multiple potential resolutions, as long as those resolutions all point
to the same file.</li>
</ul>
<p>See the <a
href="https://github.com/sass/dart-sass/blob/master/CHANGELOG.md#1890">full
changelog</a> for changes in earlier releases.</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/sass/dart-sass/blob/main/CHANGELOG.md">sass's
changelog</a>.</em></p>
<blockquote>
<h2>1.89.0</h2>
<ul>
<li>Allow the Node package importer to load files even when there are
multiple
potential resolutions, as long as those resolutions all point to the
same
file.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/sass/dart-sass/commit/4e9e2062f691359a8da582eb4e600ad5dc931c93"><code>4e9e206</code></a>
Allow the Node.js pkg importer to return the same URL multiple times (<a
href="https://redirect.github.com/sass/dart-sass/issues/2575">#2575</a>)</li>
<li>See full diff in <a
href="https://github.com/sass/dart-sass/compare/1.88.0...1.89.0">compare
view</a></li>
</ul>
</details>
<br />

<details>
<summary>Most Recent Ignore Conditions Applied to This Pull
Request</summary>

| Dependency Name | Ignore Conditions |
| --- | --- |
| sass | [< 1.55, > 1.54.0] |
</details>


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package-lock.json

@@ -3,6 +3,6 @@
     "browser-sync": "^3.0.4",
     "html-validate": "^8.11.1",
     "html-minifier": "^4.0.0",
-    "sass": "^1.88.0"
+    "sass": "^1.89.0"
   }
 }