Update github action

[vcarl]

This updates to v4 of checkout and setup-node, and drops some manual cache stuff (that appears to be slower than using it uncached

[what-the-diff]

PR Summary

• Updated GitHub Actions
  The GitHub Actions, which automate our workflow, have been updated for better performance and efficiency.

• Updated Node Setup Action
  The action used to set up Node.js in our project, has been updated ensuring the use of latest features and stability.

• Removed Cache Restoration for .next/cache
  The cache restoration step for .next/cache has been removed. This leads to cleaner code and reduces complexities during the deployment process.

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