Updated upload and download github actions.

Author: david-sh-csiro

.github/actions/build-python-package/action.yaml

@@ -30,7 +30,7 @@ runs:
         pip install build
         python3 -m build
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: ${{ inputs.artifact-name }}
         path: "dist/"

.github/actions/environment/action.yaml

@@ -38,7 +38,7 @@ runs:
           setup.cfg
 
     - name: Fetch built emsarray package
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: ${{ inputs.package-artifact-name }}
         path: "dist/"