fix: package.json & package-lock.json to reduce vulnerabilities (#840)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NEXT-14173355

Co-authored-by: snyk-bot <[email protected]>

Author: rsaz

package-lock.json

@@ -26,7 +26,7 @@
     "@uidotdev/usehooks": "^2.4.0",
     "autoprefixer": "^10.4.20",
     "clsx": "^2.1.1",
-    "next": "15.4.2",
+    "next": "15.4.8",
     "postcss": "^8.4.41",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",