Update build.yml

Author: mayeut

.github/workflows/build.yml

@@ -34,7 +34,9 @@ jobs:
       matrix: ${{ steps.matrix.outputs.matrix }}
     steps:
       - id: matrix
+        name: build matrix
         run: |
+          jq --version
           QUERY='[foreach .[] as $platform (0; foreach $platform.policies.[] as $policy (0; {policy: $policy, platform: $platform.platform, runner: $platform.runner}))]'
           JSON=$(cat << EOF | jq -c "${QUERY}"
           [