Update sites.xml
Update sites.xml

Fixed regex for IPVoid and URLVoid. Removed alienvault as it was no longer pulling relevant data. Will reach out to Alienvault to see if they have an API.

-Ian
vineyard/TekDefense-Automater,glennbarrett/TekDefense-Automater,mmaul/TekDefense-Automater,securityigi/TekDefense-Automater,gulayyener/TekDefense-Automater,wroersma/TekDefense-Automater,colinmahns/TekDefense-Automater,mixedup4x4/TekDefense-Automater,scherma/TekDefense-Automater,Theethical/TekDefense-Automater,cephurs/TekDefense-Automater,crunchsec/TekDefense-Automater,mcm/TekDefense-Automater,1aN0rmus/TekDefense-Automater,CyberScions/TekDefense-Automater,mmaul/TekDefense-Automater,groda/TekDefense-Automater,CSIRTUK/TekDefense-Automater