fix(deps): update nextjs monorepo to v15.3.0 (#947)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

examples/nextjs/package.json

@@ -11,7 +11,7 @@
     "graphiql": "graphclient serve-dev"
   },
   "dependencies": {
-    "next": "15.2.5",
+    "next": "15.3.0",
     "react": "19.0.0",
     "react-dom": "19.0.0"
   },
@@ -20,7 +20,7 @@
     "@types/node": "22.13.2",
     "@types/react": "19.0.8",
     "eslint": "9.20.1",
-    "eslint-config-next": "15.2.5",
+    "eslint-config-next": "15.3.0",
     "typescript": "5.8.3"
   }
 }