chore(deps): update redis docker tag to v8 (#677)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

docker-compose.yml

@@ -31,7 +31,7 @@ services:
     restart: unless-stopped
 
   redis:
-    image: redis:7-alpine
+    image: redis:8-alpine
     container_name: sprout-redis
     ports:
       - "6379:6379"