2024 and if you are looking for the answer, there is no parameter that does
this by default. 
You can however use a filter so that httrack will only download the html of
the spciefied name. 

An example would be : 
httrack <https://docs.netgate.com/pfsense/en/latest/recipes/scp-access.html>
-O "/path/to/output/dir" "+scp-access.html" "*.css" "*.js" "-*"

This would grab only one html from the site (the page specified with
"+scp-access.html" along with the other rendering resources.