Update bruteforce.py

xakep@pentester:~/Desktop/MyScripts/owasp/web-vulns/bruteforce$ ./bruteforce.py -h
Usage: 
--url <the link of the bruteforces page>
--username <Dvwa username>
--password <wordlist to bruteforce>

Options:
  -h, --help           show this help message and exit
  --url=URL            :past the link you want to bruteforce
  --username=USERNAME  :Dvwa username, the default is [admin]
  --passlist=WORDLIST  :File contain the passwords to try.