fix: multiline env

Author: PierreJeanjacquot

.github/workflows/sconify.yml

@@ -112,7 +112,7 @@ jobs:
         run: |
           mkdir -p $HOME/sig
           ls $HOME
-          echo ${{ secrets.scone-signing-key }} > $HOME/sig/enclave-key.pem
+          echo "${{ secrets.scone-signing-key }}" > $HOME/sig/enclave-key.pem
           echo $HOME/sig/enclave-key.pem
           docker run \
           --rm \