Use v4 for downlad and upload artifact

Author: mcuntz

.github/workflows/main.yml

@@ -70,7 +70,7 @@ jobs:
         run: |
           python -m build
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.11'
         with:
           path: dist
@@ -80,7 +80,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/download-artifact@v4.1.7
+      - uses: actions/download-artifact@v4
         with:
           name: artifact
           path: dist