Update the version and changelog (#1108)

azure-communication-ui/build.gradle

@@ -5,7 +5,7 @@ buildscript {
     }
 
     ext {
-        call_library_version_name = '1.13.0-beta.1'
+        call_library_version_name = '1.12.0-beta.1'
         chat_library_version_name = '1.0.0-beta.3'
 
         ui_library_version_code = getVersionCode()

docs/CHANGELOG_UI_CALLING.md

@@ -1,4 +1,9 @@
 # Azure Communication UI Calling Release History
+## 1.12.0-beta.1 (2024-10-10)
+
+### Features
+- Call screen header custom button
+- Color theming support
 
 ## 1.11.0 (2024-09-25)