[Misc][Typo] type annotation fix (#4495)

vllm/engine/llm_engine.py

@@ -8,7 +8,8 @@ from vllm.config import (CacheConfig, DecodingConfig, DeviceConfig, LoadConfig,
                          LoRAConfig, ModelConfig, ParallelConfig,
                          SchedulerConfig, SpeculativeConfig,
                          VisionLanguageConfig)
-from vllm.core.scheduler import Scheduler, SchedulerOutputs
+from vllm.core.scheduler import (ScheduledSequenceGroup, Scheduler,
+                                 SchedulerOutputs)
 from vllm.engine.arg_utils import EngineArgs
 from vllm.engine.metrics import StatLogger, Stats
 from vllm.engine.output_processor.interfaces import (
@@ -485,7 +486,7 @@ class LLMEngine:
     def _process_model_outputs(
         self,
         output: List[SamplerOutput],
-        scheduled_seq_groups: List[SequenceGroup],
+        scheduled_seq_groups: List[ScheduledSequenceGroup],
         ignored_seq_groups: List[SequenceGroup],
         seq_group_metadata_list: List[SequenceGroupMetadata],
     ) -> List[RequestOutput]: