Add secpoint.com to merchants.yml

Fix #481

_data/merchants.yml

@@ -197,6 +197,8 @@
       url: http://investmentart.org/
     - name: Mushroom cultures, mushroom growing supplies, seeds
       url: https://www.vesp.co/Fungible
+    - name: SecPoint IT Security Products
+      url: https://shop.secpoint.com/shop/frontpage.html
     - name: SilverRound.com - Gold and Silver Dealer
       url: https://silverround.com/
     - name: Synntech Gaming