⬆️ Update dependency next to v15.4.7 [SECURITY]

Author: renovate[bot]

docs/package.json

@@ -29,7 +29,7 @@
     "fumadocs-ui": "^15.3.4",
     "geist": "^1.4.2",
     "mermaid": "^11.6.0",
-    "next": "15.3.2",
+    "next": "15.4.7",
     "next-themes": "^0.4.6",
     "postcss": "8.5.3",
     "react": "19.1.0",