fix the 404 issues of "cheatsheet" urls (#1892)

the original url shows "404 - Not found"
update with the new one

Author: keyuchen21

examples/multi-input-output/beginner-multi-input-output.ipynb

@@ -24,7 +24,7 @@
     "- Multiple inputs and outputs\n",
     "- Double validation techniques\n",
     "\n",
-    "I strongly recommend reading the [DSPy Cheatsheet](https://dspy-docs.vercel.app/docs/cheatsheet) it will help you with quick start.\n",
+    "I strongly recommend reading the [DSPy Cheatsheet](https://dspy.ai/cheatsheet/) it will help you with quick start.\n",
     "\n",
     "## How to Start?\n",
     "\n",
@@ -1083,7 +1083,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "dspy",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -1097,9 +1097,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.3"
+   "version": "3.9.19"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 2
+ "nbformat_minor": 4
 }