[ci skip] Add return statements to CLS examples

docs/docs/transactions.md

@@ -80,7 +80,7 @@ In most case you won't need to access `namespace.get('transaction')` directly, s
 ```js
 ```js
 sequelize.transaction(function (t1) {
 sequelize.transaction(function (t1) {
   // With CLS enabled, the user will be created inside the transaction
   // With CLS enabled, the user will be created inside the transaction
-  User.create({ name: 'Alice' });
+  return User.create({ name: 'Alice' });
 });
 });
 ```
 ```
 
 
@@ -90,8 +90,10 @@ If you want to execute queries inside the callback without using the transaction
 sequelize.transaction(function (t1) {
 sequelize.transaction(function (t1) {
   sequelize.transaction(function (t2) {
   sequelize.transaction(function (t2) {
     // By default queries here will use t2
     // By default queries here will use t2
+    return Promise.all([
         User.create({ name: 'Bob' }, { transaction: null });
         User.create({ name: 'Bob' }, { transaction: null });
         User.create({ name: 'Mallory' }, { transaction: t1 });
         User.create({ name: 'Mallory' }, { transaction: t1 });
+    ]);
   });
   });
 });
 });
 ```
 ```