fix workflow

Author: qicz

.github/workflows/build_and_push_images.yaml

@@ -31,6 +31,10 @@ jobs:
   upload-separately:
     needs: build
     runs-on: ubuntu-latest
+     # ✅ matrix 必须在 job 层
+    strategy:
+      matrix:
+        filename: ${{ fromJson(steps.list_files.outputs.files_json) }}
     steps:
       - uses: actions/download-artifact@v4
         with:
@@ -48,12 +52,6 @@ jobs:
             echo "files_json=$(printf '%s\n' "${files[@]}" | jq -R . | jq -s .)" >> $GITHUB_OUTPUT
           fi
 
-    # ✅ matrix 必须在 job 层
-    strategy:
-      matrix:
-        filename: ${{ fromJson(steps.list_files.outputs.files_json) }}
-
-    steps:
       - name: Set up
         run: echo "Uploading ${{ matrix.filename }}"