Update docker.io/library/redis Docker tag to v8

Do this to avoid a restarting router affecting playbook runs on other
hosts.

inventories/chaosknoten/group_vars/all.yaml

@@ -3,7 +3,7 @@
 ansible_pull__repo_url: https://git.hamburg.ccc.de/CCCHH/ansible-infra.git
 ansible_pull__inventory: inventories/chaosknoten
 ansible_pull__playbook: playbooks/maintenance.yaml
-ansible_pull__timer_on_calendar: "*-*-* 04:00:00 Europe/Berlin"
+ansible_pull__timer_on_calendar: "*-*-* 04:30:00 Europe/Berlin"
 ansible_pull__failure_notification_address: noc-notifications@lists.hamburg.ccc.de
 ansible_pull__timer_randomized_delay_sec: 30min
 

inventories/chaosknoten/host_vars/router.yaml

@@ -1,2 +1,4 @@
 systemd_networkd__config_dir: 'resources/chaosknoten/router/systemd_networkd/'
 nftables__config: "{{ lookup('ansible.builtin.file', 'resources/chaosknoten/router/nftables/nftables.conf') }}"
+ansible_pull__timer_on_calendar: "*-*-* 04:00:00 Europe/Berlin"
+ansible_pull__timer_randomized_delay_sec: 0min

resources/chaosknoten/tickets/docker_compose/compose.yaml.j2

@@ -13,7 +13,7 @@ services:
     restart: unless-stopped
 
   redis:
-    image: docker.io/library/redis:7.4.7
+    image: docker.io/library/redis:8.4.0
     ports:
       - "6379:6379"
     volumes: