[Docs] Fix an admonition important (#23726)

Signed-off-by: windsonsea <haifeng.yao@daocloud.io>

docs/configuration/optimization.md

@@ -164,7 +164,7 @@ llm = LLM(
 )
 ```
 
-!! important
+!!! important
     Batch-level DP is not to be confused with API request-level DP
     (which is instead controlled by `data_parallel_size`).