fix typos in the docs (#46659)

README.md

@@ -89,8 +89,8 @@ We provide [English](https://www.paddlepaddle.org.cn/documentation/docs/en/guide
 
 ## Courses
 
-- [Server Deployments](https://aistudio.baidu.com/aistudio/course/introduce/19084): Courses intorducing high performance server deployments via local and remote services.
-- [Edge Deployments](https://aistudio.baidu.com/aistudio/course/introduce/22690): Courses intorducing edge deployments from mobile, IoT to web and applets.
+- [Server Deployments](https://aistudio.baidu.com/aistudio/course/introduce/19084): Courses introducing high performance server deployments via local and remote services.
+- [Edge Deployments](https://aistudio.baidu.com/aistudio/course/introduce/22690): Courses introducing edge deployments from mobile, IoT to web and applets.
 
 ## Copyright and License
 PaddlePaddle is provided under the [Apache-2.0 license](LICENSE).