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

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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 2195
git switch -c fix-pr-2195 && git push -u origin HEAD
gh pr create -t "fix: PR #2195" --body "Fixes https://github.com/cdklabs/awscdk-service-spec/pull/2195"

[github-actions]

@aws-cdk/aws-service-spec: Model database diff detected
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├[~] service aws-appstream
│ └ resources
│    ├[~]  resource AWS::AppStream::Fleet
│    │  └ properties
│    │     └ StreamView: (documentation changed)
│    ├[~]  resource AWS::AppStream::ImageBuilder
│    │  ├ properties
│    │  │  └ AppstreamAgentVersion: (documentation changed)
│    │  └ types
│    │     └[~] type AccessEndpoint
│    │       └      - documentation: Describes an interface VPC endpoint (interface endpoint) that lets you create a private connection between the virtual private cloud (VPC) that you specify and AppStream 2.0. When you specify an interface endpoint for a stack, users of the stack can connect to AppStream 2.0 only through that endpoint. When you specify an interface endpoint for an image builder, administrators can connect to the image builder only through that endpoint.
│    │              + documentation: Describes an interface VPC endpoint (interface endpoint) that lets you create a private connection between the virtual private cloud (VPC) that you specify and WorkSpaces Applications. When you specify an interface endpoint for a stack, users of the stack can connect to WorkSpaces Applications only through that endpoint. When you specify an interface endpoint for an image builder, administrators can connect to the image builder only through that endpoint.
│    └[~]  resource AWS::AppStream::Stack
│       ├ properties
│       │  ├ AccessEndpoints: (documentation changed)
│       │  └ EmbedHostDomains: (documentation changed)
│       └ types
│          └[~] type AccessEndpoint
│            └      - documentation: Describes an interface VPC endpoint (interface endpoint) that lets you create a private connection between the virtual private cloud (VPC) that you specify and AppStream 2.0. When you specify an interface endpoint for a stack, users of the stack can connect to AppStream 2.0 only through that endpoint. When you specify an interface endpoint for an image builder, administrators can connect to the image builder only through that endpoint.
│                   + documentation: Describes an interface VPC endpoint (interface endpoint) that lets you create a private connection between the virtual private cloud (VPC) that you specify and WorkSpaces Applications. When you specify an interface endpoint for a stack, users of the stack can connect to WorkSpaces Applications only through that endpoint. When you specify an interface endpoint for an image builder, administrators can connect to the image builder only through that endpoint.
└[~] service aws-backup
  └ resources
     └[~]  resource AWS::Backup::RestoreTestingSelection
        └ properties
           └ RestoreTestingSelectionName: (documentation changed)