Copy change log updates from release/v1.20.x-0.41bx (open-telemetry#3425)

Author: opentelemetrybot

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-## Version 1.20.0/0.41b0 (2023-09-01)
+## Version 1.20.0/0.41b0 (2023-09-04)
 
 - Modify Prometheus exporter to translate non-monotonic Sums into Gauges
   ([#3306](https://github.com/open-telemetry/opentelemetry-python/pull/3306))