<sort><key macro="author"/><key variable="issued"/></sort>
Upload image file with the file dialog or by dragging and dropping images onto the dashed region
You can do this yourself by deleting
<sort>
<key macro="author"/>
<key variable="issued"/>
</sort>
from any of the ACM style. General instructions here:
https://www.zotero.org/support/dev/citation_styles/style_editing_step-by-step