chore: fix build

[AsCress]

Bumps actions/upload-artifact from v3 to v4.
This is required to keep our main-builder.yml running.
v3 has been deprecated and actions using that no longer run.

Summary by Sourcery

CI:

• Update the "Publish build files" step in the main-builder.yml workflow to use actions/upload-artifact@v4 to fix a build issue caused by the deprecation of actions/upload-artifact@v3

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request updates the actions/upload-artifact GitHub Action from v3 to v4 in the main-builder.yml workflow. This resolves an issue where the workflow was failing due to the deprecation of v3.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated the actions/upload-artifact GitHub Action to the latest version.	Updated the uses property to specify version v4 of the action.	.github/workflows/main-builder.yml

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[sourcery-ai]

Hey @AsCress - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider adding a comment linking to the release notes for the action to highlight any important changes.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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