Submodule update bot: Set correct branch for Qt3D

Change-Id: Iff5a801a16811366dd5da6f0b31b272a95cb7da8
Reviewed-by: Jani Heikkinen <jani.heikkinen@theqtcompany.com>
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>