chore(deps): bump @next/mdx from 13.5.7 to 14.2.15

Bumps [@next/mdx](https://github.com/vercel/next.js/tree/HEAD/packages/next-mdx) from 13.5.7 to 14.2.15.
- [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/v14.2.15/packages/next-mdx)

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

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

Author: dependabot[bot]

apps/portal/package.json

@@ -20,7 +20,7 @@
     "@dirtycajunrice/klee": "^1.0.1",
     "@mdx-js/loader": "^2.3.0",
     "@mdx-js/react": "^2.3.0",
-    "@next/mdx": "^13.5.6",
+    "@next/mdx": "^14.2.15",
     "@radix-ui/react-dialog": "1.1.1",
     "@radix-ui/react-dropdown-menu": "^2.1.1",
     "@radix-ui/react-slot": "^1.1.0",