Update Release Notes

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

Author: camille-bouvy-frequenz

RELEASE_NOTES.md

@@ -14,6 +14,7 @@
 * Implement client instance reuse to avoid redundant TCP connections
 * Move documentation and code examples to the documentation website
 * Replace the local `PaginationParams` type with the `frequenz-client-common` one
+* Remove dependency to `googleapis-common-protos`
 
 ## Bug Fixes