Update CHANGELOG.md with PR 3383

ColeVanOphem · ColeVanOphem · commit f8c3b5f1ceb0 · 2025-05-05T23:51:40.000-04:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -33,6 +33,9 @@ Increment the:
 * [API] Add Enabled method to Tracer
   [#3357](https://github.com/open-telemetry/opentelemetry-cpp/pull/3357)
 
+* [SDK] Optimize PeriodicExportingMetricReader thread usage
+  [#3383](https://github.com/open-telemetry/opentelemetry-cpp/pull/3383)
+
 ## [1.20 2025-04-01]
 
 * [BUILD] Update opentelemetry-proto version
