[small] Upgraded node version since it was incompatible with vsce by mohsenari · Pull Request #2737 · jetify-com/devbox

Summary

upgraded github action node version for vscode extension release (requires node versions higher than 18)
see https://github.com/jetify-com/devbox/actions/runs/18883516801/job/53892792809 for failed publish action.

How was it tested?

not tested

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