chore(deps): bump the next group across 1 directory with 3 updates

Bumps the next group with 3 updates in the / directory: [@next/mdx](https://github.com/vercel/next.js/tree/HEAD/packages/next-mdx), [@next/third-parties](https://github.com/vercel/next.js/tree/HEAD/packages/third-parties) and [next](https://github.com/vercel/next.js).


Updates `@next/mdx` from 15.5.5 to 16.0.0
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/commits/v16.0.0/packages/next-mdx)

Updates `@next/third-parties` from 15.5.3 to 16.0.0
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/commits/v16.0.0/packages/third-parties)

Updates `next` from 15.5.3 to 16.0.0
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.3...v16.0.0)

---
updated-dependencies:
- dependency-name: "@next/mdx"
  dependency-version: 16.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: next
- dependency-name: "@next/third-parties"
  dependency-version: 16.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: next
- dependency-name: next
  dependency-version: 16.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: next
...

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

Author: dependabot[bot]

package-lock.json

@@ -32,15 +32,15 @@
     "@giscus/react": "^3.1.0",
     "@mdx-js/loader": "^3.1.1",
     "@mdx-js/react": "^3.1.1",
-    "@next/mdx": "^15.5.5",
-    "@next/third-parties": "15.5.3",
+    "@next/mdx": "^16.0.0",
+    "@next/third-parties": "16.0.0",
     "@vercel/analytics": "^1.5.0",
     "@vercel/speed-insights": "^1.2.0",
     "babel-plugin-react-compiler": "^19.1.0-rc.3",
     "gray-matter": "^4.0.3",
     "html-react-parser": "^5.2.7",
     "katex": "^0.16.25",
-    "next": "15.5.3",
+    "next": "16.0.0",
     "react": "19.1.1",
     "react-dom": "19.1.1",
     "react-icons": "^5.5.0",