CI: fix artifacts actions

Author: MuellerSeb

.github/workflows/main.yml

@@ -20,10 +20,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up Python 3.9
+      - name: Set up Python 3.11
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.11
 
       - name: Install dependencies
         run: |
@@ -87,19 +87,20 @@ jobs:
         run: |
           python -m build
 
-      - uses: actions/upload-artifact@v3
-        if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.9'
+      - uses: actions/upload-artifact@v4
+        if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.11'
         with:
-          path: dist
+          name: dist
+          path: dist/*
 
   upload_to_pypi:
     needs: [build_sdist]
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: artifact
+          name: dist
           path: dist
 
       - name: Publish to Test PyPI