Copy change log updates from release/v1.27.x-0.48bx (open-telemetry#4160)

Author: opentelemetrybot

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-## Version 1.27.0/0.48b0 (2024-08-26)
+## Version 1.27.0/0.48b0 (2024-08-28)
 
 - Implementation of Events API
   ([#4054](https://github.com/open-telemetry/opentelemetry-python/pull/4054))