### What this PR does / why we need it?
1. Update documentation：In the current version, we recommend using the
following: policy of swift balancer(2).
### Does this PR introduce _any_ user-facing change?
--additional-config '{ "eplb_config": {
"dynamic_eplb": true,
"expert_heat_collection_interval": 600,
"algorithm_execution_interval": 50,
"eplb_policy_type": 2,
"num_redundant_experts": {ep_size}
}}'
### How was this patch tested?
Test in DSV3.1 EP32
Signed-off-by: shenchuxiaofugui <1311027364@qq.com>
0cb4bca1ff