ci: update actions/upload-artifact to v4

[ChristosT]

Fixes current CI error

Error: This request has been automatically failed because it uses a deprecated version of actions/upload-artifact: v3. Learn more: https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/

For more see https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions

[ChristosT]

@psavery the py-lief issue is resolved upstream we can now merge this.
If it comes up again we can just pin py-lief :

-          conda install -n base --override-channels -c conda-forge conda-libmamba-solver
+          conda install -n base --override-channels -c conda-forge conda-libmamba-solver "py-lief<0.15"