build(deps-dev): bump prettier from 3.8.4 to 3.9.1 (#138)

Bumps [prettier](https://github.com/prettier/prettier) from 3.8.4 to
3.9.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/prettier/prettier/releases">prettier's
releases</a>.</em></p>
<blockquote>
<h2>3.9.1</h2>
<ul>
<li>CLI: Fix ignored file has been cached incorrectly (<a
href="https://redirect.github.com/prettier/prettier/pull/19483">#19483</a>
by <a href="https://github.com/kovsu"><code>@​kovsu</code></a>)</li>
</ul>
<p>🔗 <a
href="https://github.com/prettier/prettier/blob/3.9.1/CHANGELOG.md#391">Changelog</a></p>
<h2>3.9.0</h2>
<p><a
href="https://github.com/prettier/prettier/compare/3.8.5...3.9.0">diff</a></p>
<p>🔗 <a href="https://prettier.io/blog/2026/06/27/3.9.0">Prettier 3.9:
Major parser upgrades and Formatting improvements</a></p>
<h2>3.8.5</h2>
<ul>
<li>Fix Flow variance annotation print (<a
href="https://redirect.github.com/prettier/prettier/pull/19022">#19022</a>
by <a
href="https://github.com/marcoww6"><code>@​marcoww6</code></a>)</li>
</ul>
<p>🔗 <a
href="https://github.com/prettier/prettier/blob/3.8.5/CHANGELOG.md#385">Changelog</a></p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/prettier/prettier/blob/main/CHANGELOG.md">prettier's
changelog</a>.</em></p>
<blockquote>
<h1>3.9.1</h1>
<p><a
href="https://github.com/prettier/prettier/compare/3.9.0...3.9.1">diff</a></p>
<h4>CLI: Fix ignored file has been cached incorrectly (<a
href="https://redirect.github.com/prettier/prettier/pull/19483">#19483</a>
by <a href="https://github.com/kovsu"><code>@​kovsu</code></a>)</h4>
<p>Bug details <a
href="https://redirect.github.com/prettier/prettier/issues/18016">prettier/prettier#18016</a></p>
<h1>3.9.0</h1>
<p><a
href="https://github.com/prettier/prettier/compare/3.8.5...3.9.0">diff</a></p>
<p>🔗 <a href="https://prettier.io/blog/2026/06/27/3.9.0">Release
Notes</a></p>
<h1>3.8.5</h1>
<p><a
href="https://github.com/prettier/prettier/compare/3.8.4...3.8.5">diff</a></p>
<h4>Flow: Support <code>readonly</code> as a variance annotation (<a
href="https://redirect.github.com/prettier/prettier/pull/19022">#19022</a>
by <a
href="https://github.com/marcoww6"><code>@​marcoww6</code></a>)</h4>
<p>Flow now accepts <code>readonly</code> as a property variance
annotation, equivalent to <code>+</code> (covariant/read-only).</p>
<!-- raw HTML omitted -->
<pre lang="jsx"><code>// Input
type T = {
  readonly foo: string,
};
<p>// Prettier 3.8.4<br />
SyntaxError</p>
<p>// Prettier 3.8.5<br />
type T = {<br />
readonly foo: string,<br />
};<br />
</code></pre></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/prettier/prettier/commit/c47654c003fe525572e10d5cc1ea64d7b9c0ee55"><code>c47654c</code></a>
Release 3.9.1</li>
<li><a
href="https://github.com/prettier/prettier/commit/06159aa254e662514d1c6f4de13fbac805984232"><code>06159aa</code></a>
Fix bug in release script</li>
<li><a
href="https://github.com/prettier/prettier/commit/4bc5ab40582921f5283af4ff5d6511b58d25ec00"><code>4bc5ab4</code></a>
Update file-entry-cache to 11.1.5 (<a
href="https://redirect.github.com/prettier/prettier/issues/19483">#19483</a>)</li>
<li><a
href="https://github.com/prettier/prettier/commit/b7fd58bba027282038ad312af0522d4598e8b769"><code>b7fd58b</code></a>
Release <code>@prettier/plugin-oxc@0.2.0</code> and
<code>@prettier/plugin-hermes@0.2.0</code></li>
<li><a
href="https://github.com/prettier/prettier/commit/3006400fc2560e297b54d82c58cbc331ec87902c"><code>3006400</code></a>
Revert changes in release script</li>
<li><a
href="https://github.com/prettier/prettier/commit/7bef7dba7e99423e8f781228e8a73163f26ca9e9"><code>7bef7db</code></a>
Git blame ignore 3.9.0</li>
<li><a
href="https://github.com/prettier/prettier/commit/bb817b1bd04c04e0a8d89cb52c256a38e17fd0f5"><code>bb817b1</code></a>
Bump Prettier dependency to 3.9.0</li>
<li><a
href="https://github.com/prettier/prettier/commit/05cf896cfcc0890f58790c380f3da1d98872d071"><code>05cf896</code></a>
Clean changelog_unreleased</li>
<li><a
href="https://github.com/prettier/prettier/commit/79f6cdfd9873a91be9b25c9c6a41d26dcd9a6656"><code>79f6cdf</code></a>
Disable finished steps</li>
<li><a
href="https://github.com/prettier/prettier/commit/3613b1e5a309f5b4a74acf9436946a77e4dddf69"><code>3613b1e</code></a>
Add blog post for v3.9 (<a
href="https://redirect.github.com/prettier/prettier/issues/19414">#19414</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/prettier/prettier/compare/3.8.4...3.9.1">compare
view</a></li>
</ul>
</details>
<br />

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.yarn/install-state.gz

@@ -6023,11 +6023,11 @@ __metadata:
   linkType: hard
 
 "prettier@npm:^3.8.3":
-  version: 3.8.4
-  resolution: "prettier@npm:3.8.4"
+  version: 3.9.1
+  resolution: "prettier@npm:3.9.1"
   bin:
     prettier: bin/prettier.cjs
-  checksum: 10c0/b90a0cbe75b88ac0af9c13fe0f359bd19926fabccd88483227b21f71f0c1cc42da056fc1ac3a361e665577c568371d5ccfb2c62c31c8a1186f8d1bd531a063e9
+  checksum: 10c0/036bd6dadad577356440945deb3271668c6b6e4094e2873ffa54e14131c21915d4eefad94f53d21a08776aa1c0f5a40dcb01151c2af753f9596e15f5e97fad9d
   languageName: node
   linkType: hard