Update release notes for release 1.0.0-rc1301 (#1115)

Author: llucax

RELEASE_NOTES.md

@@ -1,17 +1,6 @@
 # Frequenz Python SDK Release Notes
 
-## Summary
-
-<!-- Here goes a general summary of what this release is about -->
-
-## Upgrading
-
-<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with -->
-
-## New Features
-
-* The `MicrogridApiClient` was updated to the latest version.
-
 ## Bug Fixes
 
-* Fix bug with LoggingConfigUpdater not updating root logger level.
+* Fix bug with `LoggingConfigUpdater` not updating root logger level.
+* The `frequenz-quantities` dependency requirement was widened to allow any v1.x version (it was pinned to `1.0.0rc3` before).