[Docs Agent] Docs Agent release version 0.4.1

[kyolee415]

What's changed:

• New how-to guide: Publish a new how-to guide on creating a new task.
• Add response type flag: Add a new flag that allows users to specify the response type of agent runtask.

Description of the change

A minor release that mainly includes a new how-to guide on creating a new task.

Motivation

Documentation update.

Type of change

Choose one: (Documentation)

Checklist

• [ X] I have performed a self-review of my code.
• [ X] I have added detailed comments to my code where applicable.
• [ X] I have verified that my change does not break existing code.
• [ X] My PR is based on the latest changes of the main branch (if unsure, please run git pull --rebase upstream main).
• [ X] I am familiar with the Google Style Guide for the language I have coded in.
• [ X] I have read through the Contributing Guide and signed the Contributor License Agreement.