Update CHANGELOG.md

Author: xrmx

CHANGELOG.md

@@ -20,7 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [BREAKING] semantic-conventions: Remove `opentelemetry.semconv.attributes.network_attributes.NETWORK_INTERFACE_NAME`
   introduced by mistake in the wrong module.
   ([#4391](https://github.com/open-telemetry/opentelemetry-python/pull/4391))
-- Add support for explicit bucket_boundaries advisory for Histograms
+- Add support for explicit bucket boundaries advisory for Histograms
   ([#4361](https://github.com/open-telemetry/opentelemetry-python/pull/4361))
 - semantic-conventions: Bump to 1.30.0
   ([#4337](https://github.com/open-telemetry/opentelemetry-python/pull/4397))