Upgrade upload-artifact action from v3 to v4

[kingthorin]

To address the DCO requirement you'll need to sign-off the commit(s):

• https://github.com/zaproxy/zaproxy/blob/main/CONTRIBUTING.md#developer-certificate-of-origin
• https://git-scm.com/docs/git-commit#Documentation/git-commit.txt---signoff

[thc202]

Closing, we'll be using a reusable workflow.

[lgmorand]

@thc202 Hi when do you plan to fix it ? the PR at least fixes the issue until you write something else.

[thc202]

See https://github.com/zaproxy/action-full-scan/issues/91#issuecomment-2323214506