Update Gerrit v3.2 release notes with ListGroups --query2 rename

The Change-Id: I1a1bdbbcd has renamed the --query2 option in the
ListGroup command into --query, which is classified as a breaking
change because it impacts the external API.

Bug: Issue 12858
Change-Id: I82e33ae94e31b97a98f6c1bf202d6c62684ec703
1 file changed