Fix associated test

javascript/ql/test/query-tests/Security/CWE-754/UnvalidatedDynamicMethodCall3.js

@@ -2,10 +2,10 @@ var express = require('express');
 var app = express();
 
 var actions = new Map();
-actions.put("play", function play(data) {
+actions.set("play", function play(data) {
     // ...
 });
-actions.put("pause", function pause(data) {
+actions.set("pause", function pause(data) {
     // ...
 });
 
@@ -14,4 +14,4 @@ app.get('/perform/:action/:payload', function(req, res) {
         let action = actions.get(req.params.action);
         res.end(action(req.params.payload)); // NOT OK, but not flagged [INCONSISTENCY]
     }
-});
+});