build(deps): bump next-themes from 0.2.1 to 0.4.4 in /docs

Bumps [next-themes](https://github.com/pacocoursey/next-themes) from 0.2.1 to 0.4.4.
- [Release notes](https://github.com/pacocoursey/next-themes/releases)
- [Commits](https://github.com/pacocoursey/next-themes/commits/v0.4.4)

---
updated-dependencies:
- dependency-name: next-themes
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

docs/package.json

@@ -4,7 +4,7 @@
   "dependencies": {
     "@heroicons/react": "~2.2.0",
     "next": "~15.0.2",
-    "next-themes": "~0.4.3",
+    "next-themes": "~0.4.4",
     "nextra": "~2.13.4",
     "nextra-theme-docs": "~2.13.4",
     "react": "~18.3.1",