build(deps): bump fumadocs-core from 15.6.9 to 15.6.12

Bumps [fumadocs-core](https://github.com/fuma-nama/fumadocs) from 15.6.9 to 15.6.12.
- [Release notes](https://github.com/fuma-nama/fumadocs/releases)
- [Commits](https://github.com/fuma-nama/fumadocs/compare/fumadocs-core@15.6.9...fumadocs-core@15.6.12)

---
updated-dependencies:
- dependency-name: fumadocs-core
  dependency-version: 15.6.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -15,7 +15,7 @@
   },
   "dependencies": {
     "@types/mdx": "^2.0.13",
-    "fumadocs-core": "^15.6.9",
+    "fumadocs-core": "^15.6.12",
     "fumadocs-mdx": "^11.7.4",
     "fumadocs-ui": "^15.6.9",
     "lucide-react": "^0.525.0",