update changelog (#25661)

Author: tvaron3

sdk/data/azcosmos/CHANGELOG.md

@@ -1,17 +1,11 @@
 # Release History
 
-## 1.5.0-beta.4 (Unreleased)
+## 1.5.0-beta.4 (2025-11-24)
 
 ### Features Added
 
 * Added client engine support for `ReadManyItems`. See [PR 25458](https://github.com/Azure/azure-sdk-for-go/pull/25458)
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
-
 ## 1.5.0-beta.3 (2025-11-10)
 
 ### Features Added