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.

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

[github-actions]

To work on this Pull Request, please create a new branch and PR. This prevents your work from being deleted by the automation.

Run the following commands inside the repo:

gh co 1279
git switch -c fix-pr-1279 && git push -u origin HEAD
gh pr create -t "fix: PR #1279" --body "Fixes https://github.com/cdklabs/awscdk-service-spec/pull/1279"

[github-actions]

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

├[~] service aws-personalize
│ └ resources
│    └[~] resource AWS::Personalize::Solution
│      └  - documentation: > After you create a solution, you can’t change its configuration. By default, all new solutions use automatic training. With automatic training, you incur training costs while your solution is active. You can't stop automatic training for a solution. To avoid unnecessary costs, make sure to delete the solution when you are finished. For information about training costs, see [Amazon Personalize pricing](https://docs.aws.amazon.com/https://aws.amazon.com/personalize/pricing/) . 
│         An object that provides information about a solution. A solution includes the custom recipe, customized parameters, and trained models (Solution Versions) that Amazon Personalize uses to generate recommendations.
│         After you create a solution, you can’t change its configuration. If you need to make changes, you can [clone the solution](https://docs.aws.amazon.com/personalize/latest/dg/cloning-solution.html) with the Amazon Personalize console or create a new one.
│         + documentation: > By default, all new solutions use automatic training. With automatic training, you incur training costs while your solution is active. To avoid unnecessary costs, when you are finished you can [update the solution](https://docs.aws.amazon.com/personalize/latest/dg/API_UpdateSolution.html) to turn off automatic training. For information about training costs, see [Amazon Personalize pricing](https://docs.aws.amazon.com/https://aws.amazon.com/personalize/pricing/) . 
│         An object that provides information about a solution. A solution includes the custom recipe, customized parameters, and trained models (Solution Versions) that Amazon Personalize uses to generate recommendations.
│         After you create a solution, you can’t change its configuration. If you need to make changes, you can [clone the solution](https://docs.aws.amazon.com/personalize/latest/dg/cloning-solution.html) with the Amazon Personalize console or create a new one.
└[~] service aws-pipes
  └ resources
     └[~] resource AWS::Pipes::Pipe
       └ types
          ├[~] type PipeSourceDynamoDBStreamParameters
          │ └ properties
          │    ├ MaximumRecordAgeInSeconds: (documentation changed)
          │    ├ MaximumRetryAttempts: (documentation changed)
          │    ├ OnPartialBatchItemFailure: (documentation changed)
          │    └ ParallelizationFactor: (documentation changed)
          ├[~] type PipeSourceKinesisStreamParameters
          │ └ properties
          │    ├ MaximumRecordAgeInSeconds: (documentation changed)
          │    ├ MaximumRetryAttempts: (documentation changed)
          │    ├ OnPartialBatchItemFailure: (documentation changed)
          │    ├ ParallelizationFactor: (documentation changed)
          │    └ StartingPosition: (documentation changed)
          ├[~] type PipeSourceManagedStreamingKafkaParameters
          │ └ properties
          │    └ StartingPosition: (documentation changed)
          └[~] type PipeSourceSelfManagedKafkaParameters
            └ properties
               └ StartingPosition: (documentation changed)