fixed Kaja's URL

_data/merchants.yml

@@ -53,7 +53,7 @@
     - name: CryptoEscrow Escrow Service
       url: http://www.cryptoescrow.eu
     - name: Esperanto lessons from Kaja
-      [email protected]
+      url: mailto:[email protected]
     - name: MyMonero Web-based Wallet
       url: https://mymonero.com
     - name: Pradeep Atluri, Psychiatrist, New York