Add TorGuard to merchants list

_data/merchants.yml

@@ -188,6 +188,8 @@
       url: https://rootbox.host/
     - name: TheBigCoin - Spend Monero Anywhere
       url: https://www.thebigcoin.io
+    - name: TorGuard - VPN, proxy and email service
+      url: https://torguard.net
     - name: Tuxcon Hosting - Mail and Web Hosting
       url: https://tuxcon.com
     - name: WalletMonero - Online Wallet