update changelog

Author: cijothomas

opentelemetry-appender-tracing/CHANGELOG.md

@@ -47,6 +47,8 @@ when conversion is feasible. Otherwise stored as
 `opentelemetry::logs::AnyValue::String`. This avoids unnecessary string
 allocation when values can be represented in their original types.
 
+- perf - small perf improvement by avoiding string allocation of `target`
+
 ## 0.28.1
 
 Released 2025-Feb-12

opentelemetry-appender-tracing/benches/logs.rs

@@ -10,7 +10,7 @@
     | noop_layer_disabled         | 12 ns       |
     | noop_layer_enabled          | 25 ns       |
     | ot_layer_disabled           | 19 ns       |
-    | ot_layer_enabled            | 167 ns      |
+    | ot_layer_enabled            | 155 ns      |
 
     Hardware: Apple M4 Pro
     Total Number of Cores:	14 (10 performance and 4 efficiency)
@@ -20,7 +20,7 @@
     | noop_layer_disabled         | 8 ns       |
     | noop_layer_enabled          | 14 ns       |
     | ot_layer_disabled           | 12 ns       |
-    | ot_layer_enabled            | 186 ns      |
+    | ot_layer_enabled            | 130 ns      |
 */
 
 use criterion::{criterion_group, criterion_main, Criterion};