create .ssh dir if necessary

action.yml

@@ -40,7 +40,10 @@ runs:
     - name: Mirror to the AUR
       run: |
         printf '%s' '${{inputs.ssh_key}}' >ssh_key
+        mkdir -p ~/.ssh
         echo 'aur.archlinux.org ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEuBKrPzbawxA/k2g6NcyV5jmqwJ2s+zpgZGZ7tpLIcN' >>~/.ssh/known_hosts
+        chmod 700 ~/.ssh
+        chmod 600 ~/.ssh/*
 
         pkgbase='${{inputs.pkgbase}}'
         [ -n "$pkgbase" ] || pkgbase="$( (. PKGBUILD && printf '%s' "$pkgbase") )"