Update CHANGELOG.md

Co-authored-by: Tammy Baylis <[email protected]>

Author: xrmx

CHANGELOG.md

@@ -13,7 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added 
 
-- `opentelemetry-instrumentation-aiohttp-client`: add support for url exclusions via `OTEL_PYTHON_EXCLUDED_URLS` / `OTEL_PYTHON_HTTPX_EXCLUDED_URLS`
+- `opentelemetry-instrumentation-aiohttp-client`: add support for url exclusions via `OTEL_PYTHON_EXCLUDED_URLS` / `OTEL_PYTHON_AIOHTTP_CLIENT_EXCLUDED_URLS`
   ([#3850](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3850))
 
 ## Version 1.38.0/0.59b0 (2025-10-16)