Updating ChangeLog for DocumentTranslation preview release (#35715)

* Updating ChangeLog for DocumentTranslation preview release

* Addressing review comments

Author: hamshavathimunibyraiah

sdk/translation/azure-ai-translation-document/CHANGELOG.md

@@ -1,18 +1,19 @@
 # Release History
 
-## 1.1.0b1 (Unreleased)
+## 1.1.0b1 (2024-05-21)
 
 ### Features Added
 - Added SingleDocumentTranslationClient that is used to invoke `document_translate` API.
 - `document_translate` is the method added to submit a single/synchronous document translation request to the Document Translation service.
 - `DocumentTranslateContent` has been added to specify the `document_translate` request content.
 
 ### Breaking Changes
-- Version `v1.0` is not supported
+- Version `v1.0` is not supported.
+- The service has changed to date-based API versioning and v1.0 service behavior is supported through the new version: 2024-05-01.
 
 ### Other Changes
 
-- This version and all future versions will require Python 3.7+. Python 3.6 is no longer supported.
+- This version and all future versions will require Python 3.8+. Python 3.7 is no longer supported.
 
 ## 1.0.0 (2022-06-07)