use explicti step

Author: kgyrtkirk

.github/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
       matrix:
         pattern: [ "A*,F*,S*", "B*,D*,L*,T*" ]
         jdk: [ "11", "21.0.4" ]
-        empty: []
+        empty:${{ fromJson('') }}
     runs-on: ubuntu-latest
     steps:
       - name: Publish Test Report