Python: added reference to AzureTextCompletion to notebook (#1456)

### Motivation and Context
This is addressing issue#1455
#1455

### Description
In the second cell, I added the missing reference to Azure Text
Completion.

In the _Context Variables_ section, I updated the first cell to include
an option to run using Azure OpenAI (was missed previously). This
follows the same format as used in other cells.

samples/notebooks/python/08-native-function-inline.ipynb

@@ -56,7 +56,7 @@
     "import os\n",
     "import sys\n",
     "import semantic_kernel as sk\n",
-    "from semantic_kernel.connectors.ai.open_ai import OpenAITextCompletion\n",
+    "from semantic_kernel.connectors.ai.open_ai import AzureTextCompletion, OpenAITextCompletion\n",
     "\n",
     "kernel = sk.Kernel()\n",
     "\n",
@@ -218,12 +218,20 @@
     "import os\n",
     "import sys\n",
     "import semantic_kernel as sk\n",
-    "from semantic_kernel.connectors.ai.open_ai import OpenAITextCompletion\n",
+    "from semantic_kernel.connectors.ai.open_ai import AzureTextCompletion, OpenAITextCompletion\n",
     "\n",
     "kernel = sk.Kernel()\n",
     "\n",
-    "api_key, org_id = sk.openai_settings_from_dot_env()\n",
-    "kernel.add_text_completion_service(\"dv\", OpenAITextCompletion(\"text-davinci-003\", api_key, org_id))"
+    "\n",
+    "useAzureOpenAI = False\n",
+    "\n",
+    "# Configure AI service used by the kernel\n",
+    "if useAzureOpenAI:\n",
+    "    deployment, api_key, endpoint = sk.azure_openai_settings_from_dot_env()\n",
+    "    kernel.add_text_completion_service(\"dv\", AzureTextCompletion(deployment, endpoint, api_key))\n",
+    "else:\n",
+    "    api_key, org_id = sk.openai_settings_from_dot_env()\n",
+    "    kernel.add_text_completion_service(\"dv\", OpenAITextCompletion(\"text-davinci-003\", api_key, org_id))"
    ]
   },
   {