chore(deps): bump next from 14.2.17 to 15.0.3

Bumps [next](https://github.com/vercel/next.js) from 14.2.17 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](vercel/next.js@v14.2.17...v15.0.3)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -29,7 +29,7 @@
     "gray-matter": "^4.0.3",
     "isomorphic-unfetch": "^4.0.0",
     "lodash": "^4.17.21",
-    "next": "^14.0.0",
+    "next": "^15.0.3",
     "next-contentlayer2": "^0.5.0",
     "next-secure-headers": "^2.1.0",
     "next-sitemap": "^4.0.0",