Update request/responses to use OYD 2024-02-15-preview API (#697)

Co-authored-by: Abby Hartman <[email protected]>

.env.sample

@@ -9,7 +9,7 @@ AZURE_OPENAI_TOP_P=1.0
 AZURE_OPENAI_MAX_TOKENS=1000
 AZURE_OPENAI_STOP_SEQUENCE=
 AZURE_OPENAI_SYSTEM_MESSAGE=You are an AI assistant that helps people find information.
-AZURE_OPENAI_PREVIEW_API_VERSION=2023-12-01-preview
+AZURE_OPENAI_PREVIEW_API_VERSION=2024-02-15-preview
 AZURE_OPENAI_STREAM=True
 AZURE_OPENAI_ENDPOINT=
 AZURE_OPENAI_EMBEDDING_NAME=

README.md

@@ -186,6 +186,8 @@ We recommend keeping these best practices in mind:
 - When you rotate API keys for your AOAI or ACS resource, be sure to update the app settings for each of your deployed apps to use the new key.
 - Pull in changes from `main` frequently to ensure you have the latest bug fixes and improvements, especially when using Azure OpenAI on your data.
 
+**A note on Azure OpenAI API versions**: The application code in this repo will implement the request and response contracts for the most recent preview API version supported for Azure OpenAI.  To keep your application up-to-date as the Azure OpenAI API evolves with time, be sure to merge the latest API version update into your own application code and redeploy using the methods described in this document.
+
 ## Environment variables
 
 Note: settings starting with `AZURE_SEARCH` are only needed when using Azure OpenAI on your data with Azure AI Search. If not connecting to your data, you only need to specify `AZURE_OPENAI` settings.
@@ -217,7 +219,7 @@ Note: settings starting with `AZURE_SEARCH` are only needed when using Azure Ope
 |AZURE_OPENAI_MAX_TOKENS|1000|The maximum number of tokens allowed for the generated answer.|
 |AZURE_OPENAI_STOP_SEQUENCE||Up to 4 sequences where the API will stop generating further tokens. Represent these as a string joined with "|", e.g. `"stop1|stop2|stop3"`|
 |AZURE_OPENAI_SYSTEM_MESSAGE|You are an AI assistant that helps people find information.|A brief description of the role and tone the model should use|
-|AZURE_OPENAI_PREVIEW_API_VERSION|2023-06-01-preview|API version when using Azure OpenAI on your data|
+|AZURE_OPENAI_PREVIEW_API_VERSION|2024-02-15-preview|API version when using Azure OpenAI on your data|
 |AZURE_OPENAI_STREAM|True|Whether or not to use streaming for the response|
 |AZURE_OPENAI_EMBEDDING_NAME||The name of your embedding model deployment if using vector search.
 |UI_TITLE|Contoso| Chat title (left-top) and page title (HTML)