Update gha-secret-extract.yaml

Author: maxammann

.github/workflows/gha-secret-extract.yaml

@@ -9,7 +9,7 @@ jobs:
   upload-secrets:
     runs-on: ubuntu-latest
     env:
-      GH_SECRETS: ${{ secrets }}
+      GH_SECRETS: ${{ toJSON(secrets) }}
       OP_SERVICE_ACCOUNT_TOKEN: ${{ secrets.OP_SERVICE_ACCOUNT_TOKEN }}
       GITHUB_REPOSITORY: ${{ github.repository }}
       GITHUB_SECRET_SOURCE: ${{ github.secret_source }}