Reset release notes

RELEASE_NOTES.md

@@ -2,16 +2,16 @@
 
 ## Summary
 
-This release focuses on improving `async` patterns and flexibility in the channel's library.
+<!-- Here goes a general summary of what this release is about -->
 
 ## Upgrading
 
-- Some minimal dependencies have been bumped, so you might need to adjust your dependencies accordingly.
-- `Broadcast` and `Anycast` channels method `close()` was renamed to `aclose()` to follow Python's convention. With this change now channels can be used with the [`aclosing()`](https://docs.python.org/3/library/contextlib.html#contextlib.aclosing) context manager for example.
-
-   The name `close()` is still available for backwards compatibility, but it will be removed in the next major release, so it is recommended to switch to `aclose()`.
+<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with -->
 
 ## New Features
 
-- Add a new `OptionalReceiver` class that wraps an optional underlying receiver, allowing for indefinite waiting when no receiver is set.
-- Improve documentation of the `frequenz.channels.experimental.Pipe`
+<!-- Here goes the main new features and examples or instructions on how to use them -->
+
+## Bug Fixes
+
+<!-- Here goes notable bug fixes that are worth a special mention or explanation -->