fix(docs): queue consumer inflight handler not supposed to have a ret…

…urn type (#6671)

Copied this code locally, unless I'm mistaken (high chance at the moment 😅), this inflight code does not return anything?

Copying the code shows errors in the IDE.

From what I understand nothing is returned, so I removed the return type in the example.

*By submitting this pull request, I confirm that my contribution is made under the terms of the [Wing Cloud Contribution License](https://github.com/winglang/wing/blob/main/CONTRIBUTION_LICENSE.md)*.

docs/docs/02-concepts/00-cloud-oriented-programming.md

@@ -22,7 +22,7 @@ let queue = new cloud.Queue(timeout: 2m);
 let bucket = new cloud.Bucket();
 let counter = new cloud.Counter(initial: 100);
 
-queue.setConsumer(inflight (body: str): str => {
+queue.setConsumer(inflight (body: str) => {
   let next = counter.inc();
   let key = "myfile-{next}.txt";
   bucket.put(key, body);