wip: encode private key

.github/workflows/deploy.yml

@@ -105,7 +105,7 @@ jobs:
         run: git --no-pager diff
       - name: Sign commit hash
         run: |
-          echo "${{ secrets.DEPLOY_PRIV_KEY }}" > /tmp/privkey
+          echo -n "${{ secrets.DEPLOY_PRIV_KEY }}" | base64 --decode > /tmp/privkey
           updater signing sign -k /tmp/privkey "${{ github.sha }}"
           rm /tmp/privkey
       # - name: Commit and push