feat(sources): update documentation

[aws-cdk-automation]

⚠️ This Pull Request updates daily and will overwrite all manual changes pushed to the branch

Updates the documentation source from upstream. See details in workflow run.

---

Automatically created by projen via the "update-source-documentation" workflow

[github-actions]

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Run the following commands inside the repo:

gh co 1273
git switch -c fix-pr-1273 && git push -u origin HEAD
gh pr create -t "fix: PR #1273" --body "Fixes https://github.com/cdklabs/awscdk-service-spec/pull/1273"

[github-actions]

@aws-cdk/aws-service-spec: Model database diff detected

├[~] service aws-autoscaling
│ └ resources
│    └[~] resource AWS::AutoScaling::ScalingPolicy
│      └ types
│         ├[~] type TargetTrackingMetricDataQuery
│         │ └  - documentation: The metric data to return. Also defines whether this call is returning data for one metric only, or whether it is performing a math expression on the values of returned metric statistics to create a new time series. A time series is a series of data points, each of which is associated with a timestamp.
│         │    `TargetTrackingMetricDataQuery` is used with the [AWS::AutoScaling::ScalingPolicy CustomizedMetricSpecification](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-autoscaling-scalingpolicy-customizedmetricspecification.html) property type.
│         │    You can call for a single metric or perform math expressions on multiple metrics. Any expressions used in a metric specification must eventually return a single time series.
│         │    For more information, see the [Create a target tracking scaling policy for Amazon EC2 Auto Scaling using metric math](https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-target-tracking-metric-math.html) in the *Amazon EC2 Auto Scaling User Guide* .
│         │    + documentation: The metric data to return. Also defines whether this call is returning data for one metric only, or whether it is performing a math expression on the values of returned metric statistics to create a new time series. A time series is a series of data points, each of which is associated with a timestamp.
│         │    You can use `TargetTrackingMetricDataQuery` structures with a `PutScalingPolicy` operation when you specify a `TargetTrackingConfiguration` in the request.
│         │    You can call for a single metric or perform math expressions on multiple metrics. Any expressions used in a metric specification must eventually return a single time series.
│         │    For more information, see the [Create a target tracking scaling policy for Amazon EC2 Auto Scaling using metric math](https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-target-tracking-metric-math.html) in the *Amazon EC2 Auto Scaling User Guide* .
│         └[~] type TargetTrackingMetricStat
│           └  - documentation: `TargetTrackingMetricStat` is a property of the [AWS::AutoScaling::ScalingPolicy TargetTrackingMetricDataQuery](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-autoscaling-scalingpolicy-targettrackingmetricdataquery.html) property type.
│              This structure defines the CloudWatch metric to return, along with the statistic and unit.
│              For more information about the CloudWatch terminology below, see [Amazon CloudWatch concepts](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_concepts.html) in the *Amazon CloudWatch User Guide* .
│              + documentation: This structure defines the CloudWatch metric to return, along with the statistic and unit.
│              `TargetTrackingMetricStat` is a property of the `TargetTrackingMetricDataQuery` object.
│              For more information about the CloudWatch terminology below, see [Amazon CloudWatch concepts](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_concepts.html) in the *Amazon CloudWatch User Guide* .
├[~] service aws-ec2
│ └ resources
│    └[~] resource AWS::EC2::NetworkInsightsAnalysis
│      └ types
│         └[~] type AnalysisRouteTableRoute
│           └ properties
│              └ destinationPrefixListId: (documentation changed)
└[~] service aws-lambda
  └ resources
     ├[~] resource AWS::Lambda::Function
     │ └ properties
     │    └ KmsKeyArn: (documentation changed)
     └[~] resource AWS::Lambda::Url
       └ properties
          └ TargetFunctionArn: (documentation changed)