revert changelog edits

Author: reyang

src/OpenTelemetry/CHANGELOG.md

@@ -19,9 +19,6 @@
   Previously it would return `null`.
   ([#4885](https://github.com/open-telemetry/opentelemetry-dotnet/pull/4885))
 
-* Updated `Microsoft.Extensions.Logging` package version to `8.0.0-rc.1.23419.4`.
-  ([#4920](https://github.com/open-telemetry/opentelemetry-dotnet/pull/4920))
-
 ## 1.6.0
 
 Released 2023-Sep-05