feat(sources): update sam (#587)

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

Updates the sam source from upstream. See details in [workflow run].

[Workflow Run]:
https://github.com/cdklabs/awscdk-service-spec/actions/runs/6414213621

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

Signed-off-by: github-actions <[email protected]>
Co-authored-by: github-actions <[email protected]>