doc: add documentation to the changelog about the removal of 3.8

[aignas]

Add changelog for #3387

[gemini-code-assist]

Summary of Changes

Hello @aignas, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on updating the project's changelog to reflect recent changes in Python toolchain support. Specifically, it adds formal documentation for the removal of Python 3.8 toolchain support, providing crucial information for users on how to manage this change. Additionally, an existing entry for Python 3.9 toolchain removal has been enhanced with a relevant issue reference, ensuring the changelog remains accurate and informative.

Highlights

• Python 3.8 Toolchain Removal Documentation: Added a new entry to the changelog documenting the removal of Python 3.8 toolchain support out of the box. This entry clarifies that users must explicitly pass TOOL_VERSIONS or use bzlmod APIs to re-enable Python 3.8, and that pip.parse calls targeting 3.8 will now be ignored.
• Python 3.9 Toolchain Removal Update: Updated the existing changelog entry regarding the removal of Python 3.9 toolchain versions (except 3.9.25) to include a reference to issue Remove Python 3.8 and 3.9 #2704.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request adds a changelog entry for the removal of Python 3.8 toolchain support. My review identifies a potential discrepancy in the referenced issue number within the new changelog entry, which should be corrected for accuracy.