Fix: Typo on overview.mdx

the import helloWorldTask wasn't called correctly at an example

Author: data-diego

docs/tasks/overview.mdx

@@ -37,7 +37,7 @@ import { helloWorldTask } from "./trigger/hello-world";
 
 async function triggerHelloWorld() {
   //This triggers the task and returns a handle
-  const handle = await helloWorld.trigger({ message: "Hello world!" });
+  const handle = await helloWorldTask.trigger({ message: "Hello world!" });
 
   //You can use the handle to check the status of the task, cancel and retry it.
   console.log("Task is running with handle", handle.id);