Fixed docs link: points at contributing section (golangci#1212)

/lgtm
/approve

Author: iwankgb

docs/src/docs/usage/faq.mdx

@@ -4,7 +4,7 @@ title: FAQ
 
 ## How do you add a custom linter?
 
-You can integrate it yourself, see this [manual](/usage/linters#how-to-add-a-linter-to-golangci-lint-).
+You can integrate it yourself, see this [manual](/contributing/new-linters/).
 Or you can create a [GitHub Issue](https://github.com/golangci/golangci-lint/issues/new) and we will integrate when time permits.
 
 ## How to integrate `golangci-lint` into large project with thousands of issues