Update changelog

src/OpenTelemetry/CHANGELOG.md

@@ -16,6 +16,15 @@ Notes](../../RELEASENOTES.md).
   `Microsoft.Extensions.Diagnostics.Abstractions` packages version to
   `9.0.0-rc.1.24431.7`.
   ([#5853](https://github.com/open-telemetry/opentelemetry-dotnet/pull/5853))
+
+* Added support in metrics for histogram bucket boundaries set via the .NET 9
+  [InstrumentAdvice<T>](https://learn.microsoft.com/dotnet/api/system.diagnostics.metrics.instrumentadvice-1)
+  API. Explicit bucket histogram boundary resolution applies in the following
+  order:
+    1. View API
+    2. Advice API
+    3. SDK defaults.
+  ([#5854](https://github.com/open-telemetry/opentelemetry-dotnet/pull/5854))
 
 ## 1.9.0