feat(sources): update cfn-schema

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

Updates the cfn-schema source from upstream. See details in [workflow run].

[Workflow Run]: https://github.com/cdklabs/awscdk-service-spec/actions/runs/19881467486

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*Automatically created by projen via the "update-source-cfn-schema" workflow*

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Author: github-actions[bot]