Update queues.md

- Added missing decleration on for loop.
- Updated the update progress step because of the api change on bullmq

Author: fcanmekikoglu

content/techniques/queues.md

@@ -218,10 +218,10 @@ import { Job } from 'bullmq';
 export class AudioConsumer extends WorkerHost {
   async process(job: Job<any, any, string>): Promise<any> {
     let progress = 0;
-    for (i = 0; i < 100; i++) {
+    for (let i = 0; i < 100; i++) {
       await doSomething(job.data);
       progress += 1;
-      await job.progress(progress);
+      await job.updateProgress(progress);
     }
     return {};
   }