Fix: use printf for SSH config to avoid heredoc indentation issues

.github/workflows/publish-aur.yml

@@ -67,11 +67,8 @@ jobs:
           echo "${{ secrets.AUR_SSH_KEY }}" > ~/.ssh/aur
           chmod 600 ~/.ssh/aur
           ssh-keyscan aur.archlinux.org >> ~/.ssh/known_hosts
-          cat >> ~/.ssh/config <<EOF
-          Host aur.archlinux.org
-            IdentityFile ~/.ssh/aur
-            User aur
-          EOF
+          printf 'Host aur.archlinux.org\n  IdentityFile ~/.ssh/aur\n  User aur\n' >> ~/.ssh/config
+          chmod 600 ~/.ssh/config
 
       - name: Clone AUR repo
         run: git clone ssh://aur@aur.archlinux.org/${{ github.event.repository.name }}.git /tmp/aur-pkg