chore(deps): bump @next/mdx from 14.1.0 to 15.0.3

Bumps [@next/mdx](https://github.com/vercel/next.js/tree/HEAD/packages/next-mdx) from 14.1.0 to 15.0.3.
- [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/v15.0.3/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]>

package.json

@@ -24,7 +24,7 @@
     "@mdx-js/react": "^3.0.1",
     "@mui/icons-material": "^6.1.5",
     "@mui/material": "^6.1.5",
-    "@next/mdx": "^14.1.0",
+    "@next/mdx": "^15.0.3",
     "@types/mdx": "^2.0.11",
     "copy-to-clipboard": "3.3.1",
     "echarts": "^5.3.3",