Update release notes (#159)

Author: ela-kotulska-frequenz

RELEASE_NOTES.md

@@ -10,9 +10,7 @@
 
 ## New Features
 
-* This release now supports the sdk up to rc2000.
-* Less logs are now on `INFO` level, and more on `DEBUG` level, making the output less verbose.
-* Changed the type of `DispatchInfo.components` from `list[int] | list[ComponentCategory]` to `list[ComponentId] | list[ComponentCategory]`, where `ComponentId` is imported from `frequenz.client.microgrid`.
+<!-- Here goes the main new features and examples or instructions on how to use them -->
 
 ## Bug Fixes