chore(deps): bump next from 15.3.9 to 15.5.15 (#25)

Bumps [next](https://github.com/vercel/next.js) from 15.3.9 to 15.5.15.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.3.9...v15.5.15)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.15
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package-lock.json

@@ -26,7 +26,7 @@
     "@vercel/analytics": "^2.0.1",
     "@vercel/speed-insights": "^2.0.0",
     "html-to-image": "^1.11.13",
-    "next": "15.3.9",
+    "next": "15.5.15",
     "react": "^18",
     "react-dom": "^18"
   },