Honestly, I don't see anything click-baity in it, the title actually aligned with the content.
HN requires that the actual article title be used, so complaining here isn't really going to do anything but add noise.
The title is "Was Kevin Cooper Framed for Murder?"
The <title> text "One Test Could Exonerate Him. Why Won't California Do It?" is a subtitle / article description.
For what it’s worth, I used the HN submit bookmarklet. I didn’t deliberately choose the title.