Update changelog

Author: mriamah

CHANGELOG.md

@@ -24,6 +24,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3610](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3610))
 - infra(ci): Fix git pull failures in core contrib test
   ([#3357](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3357))
+- `opentelemetry-instrumentation-celery`: Bump celery semantic convention schema version from 1.11.0 to 1.35.0
+  ([#3712](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3712))
 
 ### Added