docs: v4 activation height for Mainnet Beta

[rootulp]

Estimate based on https://www.mintscan.io/celestia/block/6680339

$ celestia-appd query signal upgrade --node [https://rpc.lunaroasis.net:443](https://rpc.lunaroasis.net/)
An upgrade is pending to app version 4 at height 6680339.

[gemini-code-assist]

Summary of Changes

Hello @rootulp, 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 enhancing the clarity and accuracy of the network upgrade documentation by incorporating the latest estimated details for the v4 Mainnet Beta upgrade. The primary goal is to provide users with precise information regarding the upgrade height and date, ensuring they are well-informed for the transition.

Highlights

• Documentation Update: I've updated the how-to-guides/network-upgrade-process.md file to include the estimated upgrade height and date for the upcoming v4 Mainnet Beta network upgrade. This information is crucial for users to prepare for the upgrade.
• Markdown Table Formatting: I've made minor formatting adjustments to the markdown table headers within the how-to-guides/network-upgrade-process.md file to ensure consistent rendering.

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 in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

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 issue 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 or fill out our survey to provide feedback.

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 updates the documentation for the v4 network upgrade on Mainnet Beta, providing the estimated activation height and time. My review focuses on improving the formatting of the markdown tables for better source code readability and consistency across the documentation.