[docs]: Update the translation of hertz Getting Started

[Duslia]

zh web page：https://www.cloudwego.io/zh/docs/hertz/getting-started/ zh doc：https://github.com/cloudwego/cloudwego.github.io/blob/main/content/zh/docs/hertz/getting-started/_index.md en folder：https://github.com/cloudwego/cloudwego.github.io/blob/main/content/en/docs/hertz/getting-started/_index.md

Notes:

• Do not change the original layout, code style or content sequence.
• Software Translator is a tool, not god, do not use the result as the final result.
• Translation principle: faithfulness, expressiveness and elegance.
• Submit your PR here in this repo.

[liweitingwt]

Hello， I want to try this, thank you.

[Duslia]

Well~ done!