Update release notes

Signed-off-by: Sahas Subramanian <sahas.subramanian@proton.me>

Author: shsms

RELEASE_NOTES.md

@@ -12,6 +12,8 @@
 
 * Expose microgrid config `Metadata`.
 
+* This introduces the `ComponentGraphGenerator`, that uses the assets API to fetch assets for a specified microgrid, and builds a component graph for it, from which various formulas for the microgrid can be generated.
+
 ## Bug Fixes
 
 <!-- Here goes notable bug fixes that are worth a special mention or explanation -->