fixup! fixup! Add deployment to GHA

Author: flip1995

.github/workflows/deploy.yml

@@ -69,9 +69,7 @@ jobs:
         git add .
         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
+        ssh-add - <<< "${{ secrets.DEPLOY_KEY }}"
 
         git push "$SSH_REPO" "$TARGET_BRANCH"