chore: upgrade actions/upload-artifact to v4

`actions/upload-artifact@v3` is now deprecated, so upgrade it to v4. See
https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/
for more info.

Author: lpagliari

.github/workflows/docker.yml

@@ -32,7 +32,7 @@ jobs:
           cache-to: type=gha,mode=max
           outputs: |
             type=local,dest=${{ runner.temp }}/docker-build
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
          name: gooseai
          path: ${{ runner.temp }}/docker-build/gooseai