Fix sdist artifact name. Bump version number for actions.

.github/workflows/package.yml

@@ -35,10 +35,10 @@ jobs:
       run: |
         python -m build -o dist/ --sdist .
     - name: Upload source package.
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: mashing-pumkins-sdist
-        path: dist/mashing-pumpkins-*.tar.gz
+        path: dist/mashing_pumpkins-*.tar.gz
   build-wheel-posix:
     runs-on: ${{ matrix.os }}
     permissions:
@@ -88,7 +88,7 @@ jobs:
         os: [ubuntu-latest, ubuntu-22.04, macOS-latest]
         venv_activate: ["source pyenv_base/bin/activate"]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with: