qapi: Correct spelling of QEMU in doc comments

Improve awkward phrasing in migrate-incoming While there.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20250527073916.1243024-7-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
10 files changed