update changelog

Author: lalitb

opentelemetry-appender-tracing/CHANGELOG.md

@@ -7,7 +7,6 @@
 
 - **Breaking** [1928](https://github.com/open-telemetry/opentelemetry-rust/pull/1928) Insert tracing event name into LogRecord::event_name instead of attributes.
    - Custom exporters must now serialize this field directly from LogRecord::event_name instead of iterating over the attributes.
-   - The OTLP Log Exporter (and any custom exporter using OTLP transformation from opentelemetry-proto) will no longer receive this field as an attribute.
 
 ## v0.4.0