Update main.yml

Author: yushulx

.github/workflows/main.yml

@@ -37,7 +37,7 @@ jobs:
           pip install -U wheel setuptools
           python setup.py bdist_wheel -d wheelhouse
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           path: wheelhouse/*.whl
 
@@ -50,7 +50,7 @@ jobs:
       - name: Build sdist
         run: python setup.py sdist -d dist
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           path: dist/*.tar.gz
 
@@ -59,7 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: artifact
           path: dist