macOS CI fixes

[shinra-electric]

This PR updates the macOS build yaml with the following changes:

• Update checkout from v2 to v4
• Update upload-artifact from v2 to v4
• Removes install step for Python 3.12

Reason for changes: Resolving deprecation warnings

• v2 of checkout and upload-artifact are deprecated.
• Python 3.12 is already installed and up to date

Testing:

• Ensure CI still builds

[shinra-electric]

I made the same changes to Qt_Build.yml too, but I didn't update the Windows or Linux jobs because this PR is supposed to be for macOS. They should be updated too.

There is still a deprecation warning for cache@v2 somewhere that needs to be updated, but I haven't found it yet...