dep(deps): bump the next-js group with 2 updates

Bumps the next-js group with 2 updates: [next](https://github.com/vercel/next.js) and [next-rspack](https://github.com/vercel/next.js/tree/HEAD/packages/next-rspack).


Updates `next` from 15.4.5 to 15.5.2
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.4.5...v15.5.2)

Updates `next-rspack` from 15.4.5 to 15.5.2
- [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/v15.5.2/packages/next-rspack)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: next-js
- dependency-name: next-rspack
  dependency-version: 15.5.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: next-js
...

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

Author: dependabot[bot]

package-lock.json

@@ -2,9 +2,9 @@
   "dependencies": {
     "@radix-ui/react-avatar": "~1.1.10",
     "classnames": "~2.5.1",
-    "next": "15.4.5",
+    "next": "15.5.2",
     "next-mdx-remote": "~5.0.0",
-    "next-rspack": "^15.4.5",
+    "next-rspack": "^15.5.2",
     "react": "19.1.0",
     "react-dom": "19.1.0"
   },