fixup! Add deployment to GHA

Author: flip1995

.github/workflows/deploy.yml

@@ -70,6 +70,7 @@ jobs:
         git commit -m "Automatic deploy to GitHub Pages: ${SHA}"
 
         echo ${{ secrets.DEPLOY_KEY }} > .github/deploy_key
+        chmod 600 .github/deploy_key
         eval "$(ssh-agent -s)"
         ssh-add .github/deploy_key