Please update node.js dependency to 20

[freddydk]

When using the actions currently, these warnings appear all the time:
Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: microsoft/powerplatform-actions/actions-install@v1, microsoft/powerplatform-actions/pack-solution@v1. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Thanks