chore: update release notes

Signed-off-by: Matthias Wende <[email protected]>

Author: matthias-wende-frequenz

RELEASE_NOTES.md

@@ -11,8 +11,10 @@
 ## New Features
 
 - Added consistent logger setup across all modules for structured logging and improved observability. Example notebooks updated to demonstrate logger usage.
+- The signature for passing config files MicrogridConfig.load_config() has been changed to accept a path a list of paths and a directory containing the config files.
+- `MicrogridData` class needs to be initialized with a `MicrogridConfig` object instead of a path to config file(s).
 
 ## Bug Fixes
 
 - Fixed a bug in the notification `Scheduler` where tasks could overrun the configured duration due to imprecise sleep and stop logic. The scheduler now correctly tracks elapsed time, respects task execution duration, and stops reliably after the intended interval.
-- Fixed an issue where `EmailNotification` did not properly initialise its scheduler. Also fixed an example in the docstring.
+- Fixed an issue where `EmailNotification` did not properly initialise its scheduler. Also fixed an example in the docstring.