Fixed typo / clarified comment for Promise.race

p2 presumably refers to task2 (promise2?), but task1 (p1 / promise1) actually will finish faster.

Author: Drake-Eidukas

docs/promise.md

@@ -450,7 +450,7 @@ var task2 = new Promise(function(resolve, reject) {
 
 Promise.race([task1, task2]).then(function(value) {
  console.log(value); // "one"
- // Both resolve, but p2 is faster
+ // Both resolve, but task1 resolves faster
 });
 ```