Update CHANGELOG.md

Author: xrmx

CHANGELOG.md

@@ -16,7 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-instrumentation-fastapi`: fix wrapping of middlewares
   ([#3012](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3012))
 - `opentelemetry-instrumentation-flask`: proper bucket boundaries in stable semconv http duration
-  ([#3522](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3522))
+  ([#3523](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3523))
 
 ### Breaking changes