docs(lambda): fix incorrect import in autoscaling example (#34989)

## Description

This PR fixes issue #33593 where the Lambda autoscaling example in the documentation has an incorrect import.

### Current Behavior
The example imports `Schedule` from `aws-cdk-lib/aws-autoscaling` which generates a raw cron expression (`0 8 * * *`).

### Issue
When using `aws-autoscaling.Schedule.cron()`, the generated CloudFormation template contains a raw cron expression (`Schedule: 0 8 * * *`) which is incompatible with the `AWS::ApplicationAutoScaling::ScalableTarget` resource. This resource requires the cron expression to be wrapped with `cron(...)` and also needs the AWS-specific format with `?` character.

### Fix
The correct import should be from `aws-cdk-lib/aws-applicationautoscaling` which generates the proper format (`Schedule: cron(0 8 * * ? *)`) required by `AWS::ApplicationAutoScaling::ScalableTarget`.

fixes #33593

### Description of how you validated changes

I created a test CDK app to replicate the issue by implementing two stacks:

1. A stack using the incorrect import (`aws-autoscaling`), which generated:

  Schedule: 0 8 * * *


2. A stack using the correct import (aws-applicationautoscaling
), which generated:

  Schedule: cron(0 8 * * ? *)



This confirmed that the incorrect import produces an incompatible cron expression format that would fail during CloudFormation deployment.

I also verified that the test file (
packages/aws-cdk-lib/aws-lambda/test/integ.autoscaling.lit.ts
) was already using the correct import, which further confirms this is the right approach.



### Checklist
- [X] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: GiannisMitr

packages/aws-cdk-lib/aws-lambda/README.md

@@ -1177,7 +1177,7 @@ const version = fn.currentVersion;
 You can use Application AutoScaling to automatically configure the provisioned concurrency for your functions. AutoScaling can be set to track utilization or be based on a schedule. To configure AutoScaling on a function alias:
 
 ```ts
-import * as autoscaling from 'aws-cdk-lib/aws-autoscaling';
+import * as appscaling from 'aws-cdk-lib/aws-applicationautoscaling';
 
 declare const fn: lambda.Function;
 const alias = fn.addAlias('prod');
@@ -1192,7 +1192,7 @@ as.scaleOnUtilization({
 
 // Configure Scheduled Scaling
 as.scaleOnSchedule('ScaleUpInTheMorning', {
-  schedule: autoscaling.Schedule.cron({ hour: '8', minute: '0'}),
+  schedule: appscaling.Schedule.cron({ hour: '8', minute: '0'}),
   minCapacity: 20,
 });
 ```