Bump @next/mdx from 13.0.2 to 13.4.4 in /src

Bumps [@next/mdx](https://github.com/vercel/next.js/tree/HEAD/packages/next-mdx) from 13.0.2 to 13.4.4.
- [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/v13.4.4/packages/next-mdx)

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

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

src/package.json

@@ -21,7 +21,7 @@
     "@geist-ui/icons": "^1.0.2",
     "@mdx-js/loader": "^2.1.5",
     "@mdx-js/react": "^2.1.5",
-    "@next/mdx": "^13.0.2",
+    "@next/mdx": "^13.4.4",
     "bootstrap": "^5.2.3",
     "next": "^13.0.2",
     "prettier": "^2.8.0",