update cron jsdoc example (#1940)

* update cron jsdoc example

* update cron jsdoc example

Author: ykethan

.changeset/moody-kangaroos-nail.md

@@ -0,0 +1,5 @@
+---
+'@aws-amplify/backend-function': minor
+---
+
+update cron jsdoc example

packages/backend-function/src/factory.ts

@@ -118,7 +118,7 @@ export type FunctionProps = {
    * @example
    * schedule: "every week"
    * @example
-   * schedule: "0 9 * * 2" // every Monday at 9am
+   * schedule: "0 9 ? * 2 *" // every Monday at 9am
    */
   schedule?: FunctionSchedule | FunctionSchedule[];
 };