github: bump upload/download-artifacts version

This fixes deprecation warnings about node v12.

Author: dlech

.github/workflows/publish.yml

@@ -35,7 +35,7 @@ jobs:
           CIBW_ARCHS_MACOS: x86_64 arm64
           CIBW_ARCHS_LINUX: x86_64 aarch64
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: ./wheelhouse/*.whl
 
@@ -50,7 +50,7 @@ jobs:
       - name: Build sdist
         run: pipx run build --sdist
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: dist/*.tar.gz
 
@@ -60,7 +60,7 @@ jobs:
     # upload to PyPI on every tag
     if: github.event_name == 'push' && github.ref_type == 'tag'
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v3
         with:
           name: artifact
           path: dist