[ISSUE #113] Optimize Webhook doc and add updateWebHookConfig endpoint

[Pil0tXia]

Fixes #113.

1. Fixed Webhook Chinese doc not displayed

The reason for this problem is that the ordering of files in the English document directory and the Chinese document directory do not correspond. So I removed some duplicate files and added some missing files. The missing files need to be translated. I will translate them later.

2. Add updateWebHookConfig endpoint
3. Fixed misaligned title hierarchy.
4. Fixed failed line breaks.
5. Fixed typos and case.
6. Added space between Chinese and English.

Before

English version of Webhook doc will be displayed in Chinese site:

After

[Pil0tXia]

@qqeasonchen PTAL~ 😉

[Pil0tXia]

@xwm1992 PTAL~

and: #120 #125