qapi: update prose in note blocks

Where I've noticed, rephrase the note to read more fluently.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240626222128.406106-12-jsnow@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2 files changed