Tiny fix EPLB assertion about rebalancing period and recorder window size (#6813)

python/sglang/srt/managers/eplb_manager.py

@@ -24,8 +24,8 @@ class EPLBManager:
         # Otherwise, the circular buffer will contain stale data. If the case is needed, it can be implemented.
         assert (
             self._server_args.eplb_rebalance_num_iterations
-            <= self._server_args.expert_distribution_recorder_buffer_size
-        ), "eplb_rebalance_num_iterations must be less than expert_distribution_recorder_buffer_size"
+            >= self._server_args.expert_distribution_recorder_buffer_size
+        ), "eplb_rebalance_num_iterations must be greater than expert_distribution_recorder_buffer_size"
 
         if not get_global_expert_distribution_recorder().recording:
             get_global_expert_distribution_recorder().start_record()