Update workflows

[laurarodriguesfs]

Updates needed to the .github/workflows/main.yml file

1. actions/setup-node@v2:

   v2 is an earlier version. Although there is no specific mention of setup-node in the warning, upgrading to v3 is good practice.
   Impact: Not critical, but guarantees ongoing support.

2. actions/upload-artifact@v2:

   Version v2 should be upgraded to v4, as mentioned in the email.
   Impact: Relevant, as using old versions can lead to future problems or lack of support.

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