docs: The link in 'how-to-reload-your-own-plugin' section of the FAQ page is invalid

[qlql489]

Current State

the link in https://apisix.apache.org/docs/apisix/FAQ#how-to-reload-your-own-plugin is invalid

click the link show

error link url is https://apisix.apache.org/docs/apisix/plugins.md, already invalid In the language state of Chinese,

Desired State

Fix the link to correct address

[Chever-John]

Would you like to solve this problem? @qlql489