docs: fix code comment of someAsyncApiCall example (#2999)

Author: tiendq

locale/en/docs/guides/event-loop-timers-and-nexttick.md

@@ -343,7 +343,7 @@ function someAsyncApiCall(callback) { callback(); }
 
 // the callback is called before `someAsyncApiCall` completes.
 someAsyncApiCall(() => {
-  // since someAsyncApiCall has completed, bar hasn't been assigned any value
+  // since someAsyncApiCall hasn't completed, bar hasn't been assigned any value
   console.log('bar', bar); // undefined
 });