Fix PassConfig docstring

vllm/compilation/config.py

@@ -23,6 +23,7 @@ class PassConfig(BaseModel):
         Each pass defines its own stages (before, after, maybe in-between).
     - dump_graph_dir: directory to dump the graphs. Default is .
     - enable_fusion: whether to enable the custom fusion pass.
+    - enable_reshape: whether to enable the custom reshape elimination pass.
         TODO better pass enabling system.
     """
     dump_graph_stages: List[str] = Field(default_factory=list)