Fix version number in Python example

Replace `llama3` with `llama3.1` to avoid model not found error

Author: wstnmssr

recipes/quickstart/Running_Llama3_Anywhere/Running_Llama_on_Mac_Windows_Linux.ipynb

@@ -81,7 +81,7 @@
     "\n",
     "def llama3(prompt):\n",
     "    data = {\n",
-    "        \"model\": \"llama3\",\n",
+    "        \"model\": \"llama3.1\",\n",
     "        \"messages\": [\n",
     "            {\n",
     "              \"role\": \"user\",\n",