the '?' is not present in the title of the linked article. please remove it from the title. From the guidelines[0]:

"Otherwise please use the original title, unless it is misleading or linkbait; don't editorialize."

EDIT: looking through older comments, it sounds like it originally had a '?' that they later replaced with a '.' .

[0] https://news.ycombinator.com/newsguidelines.html