fix line wrap problem

Signed-off-by: Jie Pu <pujie2@huawei.com>

README.md

@@ -75,7 +75,7 @@ Follow the [Sedna installation document](docs/setup/install.md) to install Sedna
 ### Examples
 Example1：[Using Joint Inference Service in Helmet Detection Scenario](/examples/joint_inference/helmet_detection_inference/README.md).  
 Example2：[Using Incremental Learning Job in Helmet Detection Scenario](/examples/incremental_learning/helmet_detection/README.md).  
-Example3：[Using Federated Learning Job in Surface Defect Detection Scenario](/examples/federated_learning/surface_defect_detection/README.md).
+Example3：[Using Federated Learning Job in Surface Defect Detection Scenario](/examples/federated_learning/surface_defect_detection/README.md).  
 Example4：[Using Lifelong Learning Job in Thermal Comfort Prediction Scenario](/examples/lifelong_learning/atcii/README.md).
 
 ## Roadmap