Update release notes (#244)

Author: ela-kotulska-frequenz

RELEASE_NOTES.md

@@ -1,33 +1,5 @@
 # Release Notes
 
-## Summary
-
-The Frequenz SDK now supports Python 3.11.
-
-## Upgrading
-
-## New Features
-
-- Upgrade PowerDistributingActor to track if batteries are working
-  https://github.com/frequenz-floss/frequenz-sdk-python/pull/117
-
-- Simplify `Resampler` by moving configuration to its own class `ResamplerConfig`
-  https://github.com/frequenz-floss/frequenz-sdk-python/pull/131
-
-- Add `initial_buffer_len` to the ResamplerConfig. This means that `Resampler` will store at least this number of arguments. Other `Resampler` behaviour won't change
-  https://github.com/frequenz-floss/frequenz-sdk-python/pull/131
-
-- Ability to compose formula outputs into higher-order formulas:
-  https://github.com/frequenz-floss/frequenz-sdk-python/pull/133
-
-- Add a formula generator for SoC in the LogicalMeter
-  https://github.com/frequenz-floss/frequenz-sdk-python/pull/137
-
 ## Bug Fixes
 
-- Formulas with repeated operators like `#1 - #2 - #3` were getting
-  calculated incorrectly as `#1 - (#2 - #3)`.  This has been fixed in
-  https://github.com/frequenz-floss/frequenz-sdk-python/pull/141
-
-- Remove `microgrid_api` and `component_graph` arguments from PowerDistributingActor constructor
-  https://github.com/frequenz-floss/frequenz-sdk-python/pull/156
+- Fix battery status logic: inverter that was discharging was considered as not working. So it was impossible to set any command until its state changed.