Update main.yml

attempt py12 and artifacts

.github/workflows/main.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9' 
+          python-version: '3.12' 
           cache: 'pip'
           cache-dependency-path: dtw-python/docs/apidocs-requirements.txt
 
@@ -51,7 +51,7 @@ jobs:
            tar -cvf api-docs.tar -C dtw-python/docs/_build/ html
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: api-docs
           path: api-docs.tar
@@ -67,7 +67,7 @@ jobs:
         uses: actions/checkout@v1
 
       - name: Download API docs
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: api-docs