Fix error handling for sentinel authantication command

Author: supercaracal

lib/redis/client.rb

@@ -597,7 +597,7 @@ def sentinel_detect
           raise CannotConnectError, "No sentinels available."
         rescue Redis::CommandError => err
           # this feature is only available starting with Redis 5.0.1
-          raise unless err.message.start_with?('ERR unknown command `auth`')
+          raise if err.message !~ /ERR unknown command (`|')auth(`|')/
           @options[:password] = DEFAULTS.fetch(:password)
           retry
         end