Add coindirect instant exchange

_data/merchants.yml

@@ -23,6 +23,8 @@
       url: https://changenow.io
     - name: CoinCut (OTC)
       url: https://www.coincut.com
+    - name: Coindirect - Instant exchange
+      url: https://www.coindirect.com/buy/monero
     - name: CoinSwitch.co
       url: https://www.coinswitch.co
     - name: Cryptopia