Update dependency next to v15 [SECURITY]

Author: renovate[bot]

package.json

@@ -14,7 +14,7 @@
     "clsx": "^1.2.1",
     "gray-matter": "4.0.3",
     "markdown-to-jsx": "7.1.9",
-    "next": "^13.1.6",
+    "next": "^15.0.0",
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "react-feather": "^2.0.10",