chore(deps): upgrade dev dependencies (#968)

Upgrades project dependencies. See details in [workflow run].

[Workflow Run]: https://github.com/cdklabs/awscdk-appsync-utils/actions/runs/21842958541

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*Automatically created by projen via the "upgrade-dev-deps-main" workflow*

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: cdklabs-automation