tempo: fix wireguard firewall port for aur.archlinux.org

roles/tempo/tasks/main.yml

 - name: Install tempo
   pacman: name=tempo state=present
 
-- name: Open promtail ipv4 port for monitoring.archlinux.org
+- name: Open tempo ipv4 port for aur.archlinux.org
   ansible.posix.firewalld: zone=wireguard state=enabled permanent=true immediate=yes
-    rich_rule="rule family=ipv4 source address={{ hostvars['monitoring.archlinux.org']['wireguard_address'] }} port protocol=tcp port=4318 accept"
+    rich_rule="rule family=ipv4 source address={{ hostvars['aur.archlinux.org']['wireguard_address'] }} port protocol=tcp port=4318 accept"
   tags:
     - firewall