Update code-analysis workflow to node20 actions

[fflaten]

PR Summary

Code analysis workflow running PSScriptAnalyzer reports warnings due to node16 being deprecated. PR updates actions used in workflow to version running node20.

https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/

PR Checklist

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• [ ] Tests are added/update (if required)
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