Share icons don’t have the option to edit URL because it’s share option. If you need just links to your social accounts I would recommend to use static blocks and block shortcode to show them. What I mean:
1) Create static block using Socials VC element and add the necessary links http://prntscr.com/gn26j7
2) Go to Theme Options > Header settings and use [block id=””] shortcode to show your static block in custom header area http://prntscr.com/gn27yz
