docs: Update docstring for generate function

[Hassan-Memon]

Corrected the docstring to describe the return value as 'dict: The updated state, including the LLM's generated answer' This update enhances clarity and precision in the documentation.

PR Details:

• Contribution: Updated docstring in the generate function

Sure, here’s your request with some corrections:

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Request for a Shoutout on My LinkedIn Post

Hi LangChain Team,

I hope you're doing well. I wanted to share some exciting news about my open-source contributions. Recently, I made my very first contributions to LangChain and LangGraph, with four commits merged—two for LangChain and two for LangGraph. It’s been a fulfilling experience, and I'm excited to continue contributing to these amazing projects.

I made a LinkedIn post to celebrate this milestone, which you can check out here. It would mean a lot to me if the LangChain team could give it a shoutout or some recognition, either by commenting on the post or through any other way you find suitable.

I know these contributions might seem small, but I've put a lot of effort into them, balancing this with my company's tasks, where I'm also working on a project using LangGraph. The project has been quite challenging, but I've been learning a lot along the way. Your support in highlighting this achievement would be greatly appreciated.

Thank you for considering my request and for all the incredible work the LangChain team continues to do.

Best regards,
Hassan Memon

[vbarda]

hm, what is your change? i don't see any difference from main

[Hassan-Memon]

@vbarda, here's the proposed update: The updated state, including the LLM's generated answer