Update release notes

Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

RELEASE_NOTES.md

@@ -7,7 +7,11 @@
 ## Upgrading
 
 - `GrpcStreamBroadcaster` now takes a `AsyncIterable` instead of a `AsyncIterator` as the `stream_method`. This is to match the type of streaming methods generated by `grpc`, so no conversion to an `AsyncIterator` is needed.
+
+- `GrpcStreamBroadcaster` no longer tries to reconnect when a server closes a connection.  This behaviour can be overridden by passing `retry_on_exhausted_stream=True` when constructing `GrpcStreamBroadcaster` instances.
+
 - gRPC URLs don't have a default port anymore, unless a default is set via `ChannelOptions`. If you want to set a default port for URLs, please pass custom `ChannelOptions` as `defaults` to `parse_grpc_uri` or as `channel_defaults` to `BaseApiClient`.
+
 * The `ExponentialBackoff` and `LinearBackoff` classes now require keyword arguments for their constructor. This change was made to make the classes easier to use and to avoid confusion with the order of the arguments.
 
 ## New Features