fix typo "ablility " in overview.md (#175)

fix type "ablility " in overview.md

docs/en/get_started/overview.md

@@ -4,7 +4,7 @@ This chapter introduces you to the framework of Lagent, and provides links to de
 
 ## What is Lagent
 
-Lagent is an open source LLM agent framework, which enables people to efficiently turn a large language model to agent. It also provides some typical tools to enlighten the ablility of LLM, and the whole framework is shown below:
+Lagent is an open source LLM agent framework, which enables people to efficiently turn a large language model to agent. It also provides some typical tools to enlighten the ability of LLM, and the whole framework is shown below:
 
 ![image](https://github.com/InternLM/lagent/assets/24351120/e104171e-4baf-43b3-8e6d-90cff1b298b6)