Documentation update for max 0 queue resources

Reference Slack Conversation: https://yunikornworkspace.slack.com/archives/CLNUW68MU/p1709843762474529

We are able to set:

max cpu and max memory both to 0 and schedule a pod. In the documentation here it doesn't mention that the scheduler will ignore the max if all values are set to 0, https://github.com/apache/yunikorn-core/blob/bb31066c48bcab100d3153ac1b3d105b6ba8e78b/pkg/scheduler/objects/queue.go#L399

This means that the subqueue max will be bound by the parent max.