Add changelog entry

Author: cookiefission

CHANGELOG.md

@@ -14,7 +14,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - restoring metrics in django framework
   ([#1208](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1208))
 - `opentelemetry-instrumentation-aiohttp-client` Fix producing additional spans with each newly created ClientSession
-- ([#1246](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1246))
+  ([#1246](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1246))
+
+### Added
+- `opentelemetry-instrumentation-grpc` Add grpc.aio support
+  ([#1245](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1245))
 
 ## [1.12.0-0.33b0](https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.12.0-0.33b0) - 2022-08-08