chore: add CHANGELOG entry for #4433

Signed-off-by: Ali <alliasgher123@gmail.com>

Author: alliasgher

CHANGELOG.md

@@ -16,6 +16,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Bump `pylint` to `4.0.5`
   ([#4244](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4244))
 
+### Fixed
+
+- `opentelemetry-instrumentation-flask`: Wrap `wsgi_app` call in try/finally so the `http.server.active_requests` gauge is decremented when a request raises, preventing a long-term gauge drift
+  ([#4433](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4433))
+
 ### Breaking changes
 
 - Drop Python 3.9 support