add memos to tutorials

assets/js/faucet.js

@@ -56,7 +56,7 @@ function TestNetCredentials(url, altnet_name, ws_url) {
       destination: test_wallet.address,
       memos: [
         {
-          data: xrpl.convertStringToHex("xrpl.org-faucet"),
+          data: "xrpl.org-faucet",
         },
       ],
     }),

assets/js/interactive-tutorial.js

@@ -271,10 +271,15 @@ async function call_faucet(faucet_url, destination) {
   if (typeof destination != "undefined") {
     body["destination"] = destination
   }
+  body["memos"] = [
+    {
+      data: "xrpl.org-tutorials",
+    },
+  ]
   const response = await fetch(faucet_url, {
     method: 'POST',
     headers: {
-      "Content-Type": "application/json"
+      "Content-Type": "application/json; charset=utf-8"
     },
     body: JSON.stringify(body)
   })