Update V2 Tor links to V3

[stephendonner]

Need to update the V2 .onion links [0] to their V3 equivalent, in:

• https://github.com/brave/qa-resources/blob/master/wikitemplate-tor-Linux.md
• https://github.com/brave/qa-resources/blob/master/wikitemplate-tor-Windows.md
• https://github.com/brave/qa-resources/blob/master/wikitemplate-tor-macOS(Intel).md
• https://github.com/brave/qa-resources/blob/master/wikitemplate-tor-macOS(arm64).md
• https://github.com/brave/qa-resources/blob/master/wikitemplate-tor.md

[0] http://3g2upl4pq6kufc4m.onion/ -> https://brave4u7jddbv7cyviptqjc7jusxh72uik7zt6adtckl5f4nwy2v72qd.onion/index.html