ci: Upgrade upload- and download-artifact action versions

Author: nvictus

.github/workflows/publish.yml

@@ -37,7 +37,7 @@ jobs:
           CIBW_ENVIRONMENT: MACOSX_DEPLOYMENT_TARGET=${{ env.MACOSX_DEPLOYMENT_TARGET }}
         uses: pypa/[email protected]
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           path: ./wheelhouse/*.whl
 
@@ -61,7 +61,7 @@ jobs:
       - name: Build sdist
         run: python setup.py sdist 
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           path: dist/*.tar.gz
 
@@ -71,7 +71,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           # unpacks default artifact into dist/
           # if `name: artifact` is omitted, the action will create extra parent dir