docs: Add `engines.node` override in `package.json` (#3528)

docs/package.json

@@ -30,5 +30,8 @@
     "prettier": "^3.3.3",
     "tailwindcss": "^3.4.14",
     "typescript": "^5.6.3"
+  },
+  "engines": {
+    "node": "22.x"
   }
 }