Doc: Add a documentation dependency to fix QDoc warnings about QtObject


Change-Id: Ia1464acb87c1f78c37b51aea508b3c58ac73ad9f
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
commit293b6fa71bce935135a5d68601389136fc1c5051
parentd760890ae12ca449d0948f7ea35eeda6392fe5d7
authorDavid Boddie <david.boddie@qt.io>
committerDavid Boddie <david.boddie@qt.io>
commit timeFri, 4 Sep 2026 12:02:38 +0000