build(deps): bump @codemirror/language from 6.12.1 to 6.12.3 (#7565)

Bumps [@codemirror/language](https://github.com/codemirror/language)
from 6.12.1 to 6.12.3.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/codemirror/language/blob/main/CHANGELOG.md">@​codemirror/language's
changelog</a>.</em></p>
<blockquote>
<h2>6.12.3 (2026-03-25)</h2>
<h3>Bug fixes</h3>
<p>Fix a crash in <code>bracketMatching</code> when composing at end of
document.</p>
<h2>6.12.2 (2026-02-25)</h2>
<h3>Bug fixes</h3>
<p>Make sure brackets are highlighted in the initial editor state.</p>
<p>Pause bracket matching updates during composition, to avoid
disrupting Mobile Safari's fragile composition handling.</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/codemirror/language/commit/f5af31eed71fa22e8c110d74e61098c0fb1c1acb"><code>f5af31e</code></a>
Mark version 6.12.3</li>
<li><a
href="https://github.com/codemirror/language/commit/371c9ba6be9ac489c4ebd6f26be352e0eb1a41c6"><code>371c9ba</code></a>
Fix bogus bracket highlighting being generated at end of document</li>
<li><a
href="https://github.com/codemirror/language/commit/9531899bd88aac7c932a749668ddbfcd9acfb80f"><code>9531899</code></a>
Remove duplicated slash in forum url in README</li>
<li><a
href="https://github.com/codemirror/language/commit/2f4e7014a54171ec5af260e04a97cb10c14b3aac"><code>2f4e701</code></a>
Fix forum link in readme</li>
<li><a
href="https://github.com/codemirror/language/commit/b5cd54b2ffc8e6edb0f2ae464aa2a59d600d8352"><code>b5cd54b</code></a>
Mark version 6.12.2</li>
<li><a
href="https://github.com/codemirror/language/commit/5f867636405510f243798507e7fb24f5ca5ed767"><code>5f86763</code></a>
Pause bracket matching updates during composition</li>
<li><a
href="https://github.com/codemirror/language/commit/af8dca9d061caec6e00213ac25b690e62dba39c4"><code>af8dca9</code></a>
Properly show matched brackets in the initial editor state</li>
<li><a
href="https://github.com/codemirror/language/commit/693a25efaa025d857e969720876f2dcb5683528c"><code>693a25e</code></a>
Use git+https format for package.json repository field</li>
<li>See full diff in <a
href="https://github.com/codemirror/language/compare/6.12.1...6.12.3">compare
view</a></li>
</ul>
</details>
<br />


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packages/plugins/examples/plugin-file-browser-example/package.json

@@ -20,7 +20,7 @@
   },
   "dependencies": {
     "@codemirror/lang-javascript": "^6.2.5",
-    "@codemirror/language": "^6.11.0",
+    "@codemirror/language": "^6.12.3",
     "@codemirror/state": "^6.4.0",
     "@codemirror/view": "^6.28.0",
     "@lezer/highlight": "^1.2.1",