chore(deps): update docker.io/bitnami/redis docker tag to v8

Author: renovate[bot]

charts/docker-mailserver/values.yaml

@@ -2121,7 +2121,7 @@ redis:
   image:
     registry: docker.io
     repository: bitnami/redis
-    tag: 7.4.3-debian-12-r0
+    tag: 8.0.2-debian-12-r4
     digest: ''
     ## Specify a imagePullPolicy
     ## ref: https://kubernetes.io/docs/concepts/containers/images/#pre-pulled-images