chore: correct installLatestAwsSdkDefault flag docs

[joshlartz]

Correcting docs about this flag as the implementation still defaults to true.

https://github.com/aws/aws-cdk/blob/v2.123.0/packages/aws-cdk-lib/custom-resources/lib/aws-custom-resource/aws-custom-resource.ts#L471-L473

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[joshlartz]

Thanks @kylelaker !

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 0b033935473c81b4acfadd2456a23c686d6303c1
• Result: FAILED
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[joshlartz]

@kylelaker You were right that there were unintended changes from this. It looks like there was an assumption built in that flags would always end up being true in v2. It is causing the "Flags with a different default in v2" section to be updated incorrectly.

Example:

Flag	Summary	Type	Since	v1 default	v2 default
@aws-cdk/customresources:installLatestAwsSdkDefault	Whether to install the latest SDK by default in AwsCustomResource	(default)		false	true

Here is an example of a cdk.json file that restores v1 behavior for these flags:

{
  "context": {
    "@aws-cdk/core:newStyleStackSynthesis": false,
    "@aws-cdk/core:stackRelativeExports": false,
    "@aws-cdk/aws-rds:lowercaseDbIdentifier": false,
    "@aws-cdk/aws-apigateway:usagePlanKeyOrderInsensitiveId": false,
    "@aws-cdk/aws-lambda:recognizeVersionProps": false,
    "@aws-cdk/aws-cloudfront:defaultSecurityPolicyTLSv1.2_2021": false,
    "@aws-cdk/customresources:installLatestAwsSdkDefault": false
  }
}

[aws-cdk-automation]

This PR has been in the BUILD FAILING state for 3 weeks, and looks abandoned. To keep this PR from being closed, please continue work on it. If not, it will automatically be closed in a week.

[aws-cdk-automation]

This PR has been deemed to be abandoned, and will be automatically closed. Please create a new PR for these changes if you think this decision has been made in error.

[joshlartz]

Not stale, just waiting on an answer still :( @kylelaker