updating version number

Author: Vinothini Dharmaraj

sdk/communication/Azure.Communication.CallAutomation/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Release History
 
-## 1.3.0 (Unreleased)
+## 1.3.0-beta.2 (Unreleased)
 
 ### Features Added
 
@@ -13,12 +13,6 @@
 - Added CreateCallFailed event to signify when create call API fails to establish a call
 - Added AnswerFailed event to signify when answer call API fails to answer a call
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
-
 ## 1.3.0-beta.1 (2024-08-02)
 
 ### Features Added