changelog: Built-in Login for App Builder

[Jocky-Teable]

Changes

• Added EN changelog entry for Built-in Login for App Builder
• Added ZH changelog entry

Preview

https://help.teable.ai/en/changelog

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}