ci(docker-build-push): upload digest with unique names

.github/workflows/docker-build-push.yml

@@ -94,7 +94,7 @@ jobs:
       - name: Upload digest
         uses: actions/upload-artifact@v4
         with:
-          name: digests
+          name: digest-${{ matrix.platform }}
           path: /tmp/digests/*
           if-no-files-found: error
           retention-days: 1
@@ -110,8 +110,9 @@ jobs:
       - name: Download digests
         uses: actions/download-artifact@v4
         with:
-          name: digests
+          pattern: digest-*
           path: /tmp/digests
+          merge-multiple: true
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3