PyPI build: merge artifacts into dist/ directory

.github/workflows/build_upload_pypi_wheels.yml

@@ -33,8 +33,6 @@ jobs:
             numpy-version: 1.23.2
       fail-fast: false
     runs-on: ${{ matrix.os }}
-    permissions:
-      id-token: write
     steps:
       - uses: actions/checkout@v4
         with:
@@ -112,6 +110,7 @@ jobs:
         uses: actions/download-artifact@v4
         with:
           path: dist/
+          merge-multiple: true
 
       - name: List Files
         run: ls -R