fix(github-action): write the signed contents properly to disk

Author: ekristen

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
           text: release/sift-cli-linux.sha256
           key: ${{ secrets.PGP_PUBLIC_KEY }}
           privateKey: ${{ secrets.PGP_PRIVATE_KEY }}
-      - run: echo ${{ steps.pgp.outputs.envEncryptedText }} > release/sift-cli-linux.sha256.asc
+      - run: echo "$envEncryptedText" > release/sift-cli-linux.sha256.asc
       - name: release
         if: startsWith(github.ref, 'refs/tags/')
         uses: svenstaro/upload-release-action@v2