chore: org -> io

Author: chedieck

config/example-config.json

@@ -13,7 +13,7 @@
   },
   "networkBlockchainURLs": {
     "ecash": [
-      "https://xec.paybutton.org",
+      "https://xec.paybutton.io",
       "https://chronik1.alitayin.com",
       "https://chronik2.alitayin.com",
       "https://chronik.e.cash",