bump versions for source artifact

Author: jmalkin

.github/workflows/build_wheels.yml

@@ -12,9 +12,9 @@ jobs:
     name: Source distribution
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         name: Install Python
         with:
           python-version: '3.x'
@@ -25,9 +25,11 @@ jobs:
       - name: Build sdist
         run: python -m build --sdist --outdir dist
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           path: dist/*.tar.gz
+          compression-level: 0 # contents are already compressed
+
 
   build_wheels:
     name: ${{ matrix.config.name }}