it would have to be via an external service such as dropbox, google drive, mega, etc.
IF you have a replay of the AAS+decoy dealing the damage, you could send it in to the bug report email.
Heroesbugattachments@blizzard.com
I’ve already get a link to your post sent in, but you should probably also link to the following URL (one which has your image of decoy including AAS).
Nova needs a buff - #53 by Syrnis-2802?
As well as any data you have which is mentioned here
you will need to quote the url to get the full one, but it just links to your discovery.
Thank you