Update react.en.mdx

pages/techniques/react.en.mdx

@@ -174,6 +174,6 @@ The output we get is as follows:
 "Harry Styles, Olivia Wilde's boyfriend, is 29 years old and his age raised to the 0.23 power is 2.169459462491557."
 ```
 
-We adapted the example from the [LangChain documentation](https://python.langchain.com/en/latest/modules/agents/getting_started.html), so credit goes to them. We encourage the learner to explore different combination of tools and tasks. 
+We adapted the example from the [LangChain documentation](https://python.langchain.com/docs/modules/agents/agent_types/react), so credit goes to them. We encourage the learner to explore different combination of tools and tasks. 
 
 You can find the notebook for this code here: https://github.com/dair-ai/Prompt-Engineering-Guide/blob/main/notebooks/react.ipynb