Clear release notes

Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

RELEASE_NOTES.md

@@ -1,10 +1,17 @@
 # Frequenz Electricity Trading API Client 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
 
-- Update to API v0.7.0
+<!-- Here goes the main new features and examples or instructions on how to use them -->
 
 ## Bug Fixes
 
-- Ensure timestamp conversion errors are surfaced
-- Use HasField to check explicit field precedence
+<!-- Here goes notable bug fixes that are worth a special mention or explanation -->