fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NEXT-8520073

Author: snyk-bot

package-lock.json

@@ -13,7 +13,7 @@
     "contentstack": "^3.20.1",
     "html-react-parser": "^5.1.12",
     "moment": "^2.30.1",
-    "next": "^14.2.10",
+    "next": "^14.2.15",
     "react": "^18",
     "react-dom": "^18",
     "react-loading-skeleton": "^3.4.0"