docs(cn): fix broken link in `config`

[Zuoqiu-Yingyi]

There is a redundant slash / in front of the link anchor #

[netlify[bot]]

❌ Deploy Preview for cn-vitest failed.

Name	Link
🔨 Latest commit	430a66d9aa5c23080af71d37f00f9ea267633d79
🔍 Latest deploy log	https://app.netlify.com/sites/cn-vitest/deploys/667a61f1daf1ee0008fa2e57

[thinkasany]

thanks for your contributions!