Clear release notes

Signed-off-by: Stefan Brus <[email protected]>

Author: stefan-brus-frequenz

RELEASE_NOTES.md

@@ -1,10 +1 @@
 # Release notes
-
-- The field `create_time` has been removed from update requests.
-- An `update_time` field has been added to the Dispatch object.
-- The `type` field has been removed from update requests, to prevent it from being modified after creation.
-- `DispatchFilter` has been replaced by `DispatchListRequest` as a parameter for `ListDispatches`.
-  - The filter has additionally been re-designed, with fields that lack use cases being removed.
-- Removed the ability to update `microgrid_id` on an existing dispatch.
-- Removed the HTTP proxy gateway URLs, as these will not be used by the dispatch API.
-- Added RPCs for getting and deleting a single dispatch.