fix format issue

Author: louie-tsai

DocSum/README.md

@@ -90,8 +90,8 @@ Install Helm (version >= 3.15) first. Refer to the [Helm Installation Guide](htt
 
 Refer to the [DocSum helm chart](https://github.com/opea-project/GenAIInfra/tree/main/helm-charts/docsum) for instructions on deploying DocSum into Kubernetes on Xeon & Gaudi.
 
-
 ### Workflow of the deployed Document Summarization Service
+
 The workflow of the Document Summarization Service, from user's input query to the application's output response, is as follows:
 
 ```mermaid
@@ -113,7 +113,6 @@ flowchart LR
     end
 ```
 
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 ## Consume Document Summarization Service
 
 Two ways of consuming Document Summarization Service: