Update release notes

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

Author: shsms

RELEASE_NOTES.md

@@ -6,7 +6,7 @@ This release adds support for retrieving microgrid electrical component connecti
 
 ## Upgrading
 
-No migration required. This is a backward-compatible feature addition.
+- The `get_microgrid` and `list_microgrid_electrical_components` methods now expect an argument of type `MicrogridId`, instead of an `int`.
 
 ## New Features
 
@@ -18,4 +18,4 @@ No migration required. This is a backward-compatible feature addition.
 
 ## Bug Fixes
 
-<!-- No bug fixes in this release -->
+<!-- No bug fixes in this release -->