chore(deps): bump next from 15.2.0 to 15.2.3 in /apps/site (#7558)

Bumps [next](https://github.com/vercel/next.js) from 15.2.0 to 15.2.3.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.2.0...v15.2.3)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

apps/site/package.json

@@ -53,7 +53,7 @@
     "github-slugger": "~2.0.0",
     "glob": "~11.0.1",
     "gray-matter": "~4.0.3",
-    "next": "15.2.0",
+    "next": "15.2.3",
     "next-intl": "~3.26.5",
     "next-themes": "~0.4.4",
     "postcss": "~8.5.3",