Update projects-using-wsb.md to include NextDNS. (#255)
Update projects-using-wsb.md to include NextDNS. (#255)

Update Projects using WindowsSpyBlocker;
Add: NextDNS;
Reasons:
1. It's grown to include a fairly large user base
2. As such, I thought it important, as a NextDNS user, for you to know if it's inclusion of your `WindowsSpyBlocker - Hosts spy rules` among the choices of ad/track/etc server lists to which to subscribe.
crazy-max/WindowsSpyBlocker