chore(valkey): change valkey replicas to 3

Author: duanhongyi

charts/workflow/values.yaml

@@ -192,7 +192,7 @@ valkey:
   addrs: "" # A list of clusters: "127.0.0.1:7001/1,127.0.0.2:7002/1"
   password: "valkey password" # "" == no password
   # The following parameters are configured only when using an on-cluster Valkey instance
-  replicas: 1
+  replicas: 3
   persistence:
     enabled: false # Set to true to enable persistence
     size: 5Gi