"Failed to resolve" error when set user-agent to nmap

[diegoxcn]

Describe the bug
seems like rustscan can't pass http.useragent strings to nmap correctly.

To Reproduce
Steps to reproduce the behavior:

rustscan -u 5000 -a 127.0.0.1 -- --script-args http.useragent="Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/94.0" -sC -sV

Expected behavior
expected to call nmap use assigned user-agent string to scan target without problem.

Screenshots

Desktop (please complete the following information):

• OS: ubuntu 21.10
• Browser firefox
• Version 94

Additional context
Add any other context about the problem here.