More thorough changes to adapt to artifacts v4

.github/workflows/refresh-lockfiles.yml

@@ -54,6 +54,7 @@ jobs:
       - name: output lockfile
         uses: actions/upload-artifact@v4
         with:
+          name: lock-artifacts-${{matrix.python}}
           path: ${{matrix.python}}-linux-64.lock
 
   create_pr:
@@ -69,14 +70,9 @@ jobs:
       - name: get artifacts
         uses: actions/download-artifact@v4
         with:
-          path: artifacts
+          path: ${{ github.workspace }}/requirements/locks
           merge-multiple: true
 
-      - name: Update lock files in repo
-        run: |
-          cp artifacts/artifact/*.lock requirements/locks
-          rm -r artifacts
-
       - name: "Generate token"
         uses: tibdex/github-app-token@v2
         id: generate-token