Update README.md (infiniflow#1285)

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [x] Documentation Update

graph/README.md

@@ -9,7 +9,7 @@ English | [简体中文](./README_zh.md)
 It is used to compose a complex work flow or agent. 
 And this graph is beyond the DAG that we can use circles to describe our agent or work flow.
 Under this folder, we propose a test tool ./test/client.py which can test the DSLs such as json files in folder ./test/dsl_examples.
-Please use this client at the same folder you start RAGFlow. If it's ran by docker, please go into the container before running the client.
+Please use this client at the same folder you start RAGFlow. If it's run by Docker, please go into the container before running the client.
 Otherwise, correct configurations in conf/service_conf.yaml is essential.
 
 ```bash