fix parallle upload artifact breaking changes

ref) https://github.com/actions/upload-artifact/blob/ef09cdac3e2d3e60d8ccadda691f4f1cec5035cb/docs/MIGRATION.md

.github/workflows/parallel.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Upload
       uses: actions/upload-artifact@master
       with:
-        name: out
+        name: out-${{ matrix.node }}
         path: out
     - name: Download
       uses: actions/download-artifact@master
@@ -36,7 +36,8 @@ jobs:
       uses: actions/download-artifact@master
       with:
         name: out
-        path: out
+        pattern: out-*
+        merge-multiple: true
     - name: Print
       run: |
         ls