Ordinarily we users on the forum suggest using this link:
Reporting a Possible False Positive File or Website - https://www.avast.com/false-positive-file-form.php.
You should get a response in a day or two.
However it should be the same for the French language link you posted.
You don’t say exactly when you reported this, if over the weekend it may be a little over that.
You could also post the domain name of the link involved (without the http/s elements so it isn’t active), that way there are some on the forums that can investigate the site using different means.