updated langchain/docs/modules/models/llms/integrations/ notebooks (#3041)

- Updated `langchain/docs/modules/models/llms/integrations/` notebooks:
added links to the original sites, the install information, etc.
- Added the `nlpcloud` notebook.
- Removed "Example" from Titles of some notebooks, so all notebook
titles are consistent.

docs/modules/models/llms/integrations/azure_openai_example.ipynb

@@ -5,7 +5,7 @@
    "id": "9e9b7651",
    "metadata": {},
    "source": [
-    "# Azure OpenAI LLM Example\n",
+    "# Azure OpenAI\n",
     "\n",
     "This notebook goes over how to use Langchain with [Azure OpenAI](https://aka.ms/azure-openai).\n",
     "\n",
@@ -49,6 +49,18 @@
     "```\n"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "89fdb593-5a42-4098-87b7-1496fa511b1c",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "!pip install openai"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,
@@ -146,7 +158,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.9"
+   "version": "3.10.6"
   },
   "vscode": {
    "interpreter": {