fix docs python version incompatibility

[jhnwu3]

This pull request updates the Python version used in the Read the Docs configuration to align with the project's current requirements. The changes ensure consistency across configuration files.

Updates to Read the Docs configuration:

• Removed the outdated .readthedocs.yaml file, which specified Python 3.10, as it is no longer needed.
• Updated the readthedocs.yml file to use Python 3.10 instead of Python 3.8 for the build environment.

[Copilot]

Pull Request Overview

This pull request consolidates Read the Docs configuration files and updates the Python version to 3.10 for consistency across the project's build environment.

• Removes duplicate .readthedocs.yaml configuration file that was specifying Python 3.10
• Updates the main readthedocs.yml file to use Python 3.10 instead of Python 3.8

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
readthedocs.yml	Updates Python version from 3.8 to 3.10 for the build environment
docs/.readthedocs.yaml	Removes duplicate configuration file that was already specifying Python 3.10