Fix version in CI.

Author: cottrell

.github/workflows/CI.yml

@@ -18,7 +18,7 @@ jobs:
         command: build
         args: --release --sdist -o dist --find-interpreter
     - name: Upload wheels
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: wheels
         path: dist
@@ -32,7 +32,7 @@ jobs:
         command: build
         args: --release -o dist --find-interpreter
     - name: Upload wheels
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: wheels
         path: dist
@@ -46,7 +46,7 @@ jobs:
         command: build
         args: --release -o dist --universal2 --find-interpreter
     - name: Upload wheels
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: wheels
         path: dist
@@ -57,7 +57,7 @@ jobs:
     if: "startsWith(github.ref, 'refs/tags/')"
     needs: [ macos, windows, linux ]
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
         with:
           name: wheels
       - name: Publish to PyPI
@@ -66,4 +66,4 @@ jobs:
           MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
         with:
           command: upload
-          args: --skip-existing *
+          args: --skip-existing *