[OpenAI] Prepare for 1.0.0-beta.2 release (Azure#35452)

Author: mssfang

sdk/openai/azure-ai-openai/CHANGELOG.md

@@ -1,15 +1,21 @@
 # Release History
 
-## 1.0.0-beta.2 (Unreleased)
-
-### Features Added
+## 1.0.0-beta.2 (2023-06-13)
 
 ### Breaking Changes
 
+- Removed class `ChatMessageDelta` and replaced usage of it by `ChatMessage`. 
+
 ### Bugs Fixed
+- [PR#35336](https://github.com/Azure/azure-sdk-for-java/commit/bf4fdac9cea3c18362029df4589bc78b834a4348) fixed
+  `com.fasterxml.jackson.databind.exc.MismatchedInputException: Missing required creator property 'usage' (index 3)`.
 
 ### Other Changes
 
+#### Dependency Updates
+- Updated `azure-core` to `1.40.0`.
+- Updated `azure-core-http-netty` to `1.13.4`.
+
 ## 1.0.0-beta.1 (2023-05-22)
 
 - Azure OpenAI client library for Java. This package contains Microsoft Azure OpenAI client library. Initial generation from [spec](https://github.com/Azure/azure-rest-api-specs/tree/main/specification/cognitiveservices/OpenAI.Inference)

sdk/openai/azure-ai-openai/README.md

@@ -39,7 +39,7 @@ If you want to see the full code for these snippets check out our [samples folde
 <dependency>
     <groupId>com.azure</groupId>
     <artifactId>azure-ai-openai</artifactId>
-    <version>1.0.0-beta.1</version>
+    <version>1.0.0-beta.2</version>
 </dependency>
 ```
 [//]: # ({x-version-update-end})
@@ -99,7 +99,7 @@ Authentication with AAD requires some initial setup:
 <dependency>
     <groupId>com.azure</groupId>
     <artifactId>azure-identity</artifactId>
-    <version>1.9.0</version>
+    <version>1.9.1</version>
 </dependency>
 ```
 [//]: # ({x-version-update-end})