try to fix workflow

Author: mad-pf

.github/workflows/release.yaml

@@ -65,12 +65,12 @@ jobs:
     steps:
     - run: echo "real release"; echo "$event"
       env:
-        event: ${{ github.event }}
+        event: ${{ github.event | marshal }}
   test_prerelease:
     if: "github.event.release.prerelease"
     needs: build
     runs-on: ubuntu-latest
     steps:
     - run: echo "pre-release"; echo "$event"
       env:
-        event: ${{ github.event }}
+        event: ${{ github.event | marshal }}