Update settings.html

settings.html

@@ -171,7 +171,7 @@ input[type="number"] {
   </script>
 
   <script>
-  document.getElementById("ed_set_but").addEventListener("click", function() {
+  document.getElementById("ec_set_but").addEventListener("click", function() {
     var ecValue = document.getElementById("ec_set").value;
     var xhr = new XMLHttpRequest();
     xhr.open("GET", "/EC_set?value=" + ecValue, true);