Update azureml_chat_endpoint code exemple (#11602)

- **Description:** azureml_chat_endpoint code exemple now takes
endpoint_url and endpoint_api_key parameter into consideration,
  - **Issue:** None),
  - **Dependencies:** None,
  - **Tag maintainer:** None,
  - **Twitter handle:** @ElliotAlladaye

docs/docs_skeleton/docs/integrations/chat/azureml_chat_endpoint.ipynb

@@ -63,7 +63,11 @@
     "from langchain.chat_models.azureml_endpoint import LlamaContentFormatter\n",
     "from langchain.schema import HumanMessage\n",
     "\n",
-    "chat = AzureMLChatOnlineEndpoint(content_formatter=LlamaContentFormatter())\n",
+    "chat = AzureMLChatOnlineEndpoint(\n",
+    "    endpoint_url=\"https://<your-endpoint>.<your_region>.inference.ml.azure.com/score\",\n",
+    "    endpoint_api_key=\"my-api-key\",\n",
+    "    content_formatter=LlamaContentFormatter,\n",
+    "))\n",
     "response = chat(messages=[\n",
     "    HumanMessage(content=\"Will the Collatz conjecture ever be solved?\")\n",
     "])\n",