Prepare release notes for release

Signed-off-by: Mathias L. Baumann <[email protected]>

Author: Marenz

RELEASE_NOTES.md

@@ -1,20 +1,8 @@
 # Frequenz Dispatch API Release Notes
 
-## Summary
-
-<!-- Here goes a general summary of what this release is about -->
-
 ## Upgrading
 
 - Queries that compare against a time interval filter should check for the end time inside the recurrence rule.
 - `end_time` has been renamed `until` and is mutually exclusive with `count`.
 - Update request handlers should check the field mask for which attributes to update.
 - The common api dependency has been udpated so that the `v1` paths for `ComponentCategory` is used.
-
-## New Features
-
-<!-- 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 -->