build(deps): bump fumadocs-ui from 15.5.3 to 15.5.4

Bumps [fumadocs-ui](https://github.com/fuma-nama/fumadocs) from 15.5.3 to 15.5.4.
- [Release notes](https://github.com/fuma-nama/fumadocs/releases)
- [Commits](https://github.com/fuma-nama/fumadocs/compare/fumadocs-ui@15.5.3...fumadocs-ui@15.5.4)

---
updated-dependencies:
- dependency-name: fumadocs-ui
  dependency-version: 15.5.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -16,7 +16,7 @@
     "@types/mdx": "^2.0.13",
     "fumadocs-core": "^15.5.3",
     "fumadocs-mdx": "^11.6.9",
-    "fumadocs-ui": "^15.5.3",
+    "fumadocs-ui": "^15.5.4",
     "lucide-react": "^0.513.0",
     "mdx": "^0.3.1",
     "next": "^15.3.3",