Update release notes

Signed-off-by: camille-bouvy-frequenz <[email protected]>

Author: camille-bouvy-frequenz

RELEASE_NOTES.md

@@ -12,6 +12,7 @@
 
 * Add helper function to support creating quantities that conform to the API expectations.
 * Add `receive-gridpool-trades` command to CLI tool.
+* Prevent getting warning loggings when the streaming channels overflow
 
 <!-- Here goes the main new features and examples or instructions on how to use them -->