Update redis Docker tag to v8

Author: renovate[bot]

deployments/docker/docker-compose.yml

@@ -1,7 +1,7 @@
 version: '3'
 services:
     redis:
-        image: 'redis:6.2.4-alpine'
+        image: 'redis:8.0.3-alpine'
         volumes:
             - 'rabbit_redis:/data'
         restart: unless-stopped