Update GitHub Artifact Actions (#10)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/pypi.yaml

@@ -19,7 +19,7 @@ jobs:
       run: pipx run build --sdist
     - name: Check metadata
       run: pipx run twine check dist/*
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v7
       with:
         name: cibw-sdist
         path: dist/*.tar.gz
@@ -35,7 +35,7 @@ jobs:
     - uses: actions/setup-python@v6
       with:
         python-version: "3.x"
-    - uses: actions/download-artifact@v4
+    - uses: actions/download-artifact@v8
       with:
         pattern: cibw-*
         path: dist