chore(deps): update nextjs monorepo to v15.3.0

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
     "@vitest/coverage-v8": "3.1.1",
     "cpy": "11.1.0",
     "eslint": "9.24.0",
-    "eslint-config-next": "15.2.5",
+    "eslint-config-next": "15.3.0",
     "eslint-config-prettier": "10.1.1",
     "eslint-plugin-prettier": "5.2.6",
     "execa": "9.5.2",

packages/website/package.json

@@ -19,7 +19,7 @@
     "@types/react-dom": "19.1.2",
     "@uiw/react-codemirror": "4.23.7",
     "clsx": "2.1.1",
-    "next": "15.2.5",
+    "next": "15.3.0",
     "next-themes": "0.4.6",
     "nextra": "3.3.1",
     "nextra-theme-docs": "3.3.1",