Update codecov/codecov-action action to v4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
codecov/codecov-action	action	major	v3 -> v4

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Release Notes

codecov/codecov-action (codecov/codecov-action)

### [`v4`](https://togithub.com/codecov/codecov-action/compare/v3...v4) [Compare Source](https://togithub.com/codecov/codecov-action/compare/v3...v4)

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Configuration

📅 Schedule: Branch creation - "on sunday before 6:00am" in timezone UTC, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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Name	Status	Preview	Comments	Updated (UTC)
lobe-midjourney-webui	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 4, 2024 5:31am

[lobehubbot]

👍 @renovate[bot]

Thank you for raising your pull request and contributing to our Community Please make sure you have followed our contributing guidelines. We will review it as soon as possible. If you encounter any problems, please feel free to connect with us.\ 非常感谢您提出拉取请求并为我们的社区做出贡献，请确保您已经遵循了我们的贡献指南，我们会尽快审查它。 如果您遇到任何问题，请随时与我们联系。

[lobehubbot]

❤️ Great PR @renovate[bot] ❤️

The growth of project is inseparable from user feedback and contribution, thanks for your contribution! If you are interesting with the lobehub developer community, please join our discord and then dm @arvinxx or @canisminor1990. They will invite you to our private developer channel. We are talking about the lobe-chat development or sharing ai newsletter around the world.\ 项目的成长离不开用户反馈和贡献，感谢您的贡献! 如果您对 LobeHub 开发者社区感兴趣，请加入我们的 discord，然后私信 @arvinxx 或 @canisminor1990。他们会邀请您加入我们的私密开发者频道。我们将会讨论关于 Lobe Chat 的开发，分享和讨论全球范围内的 AI 消息。

[lobehubbot]

:tada: This PR is included in version 1.4.8 :tada:

The release is available on GitHub release

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