Mocha docs has wrong third-party example link

[khg0712]

Description

In third-party reporter part of docs, there is a our working directory link to mocha's official example.
reference

this link refers to https://github.com/mochajs/mocha-examples/tree/master/third-party-reporter. but when you try to access to that address, github returns 404 page.

the right address is https://github.com/mochajs/mocha-examples/tree/master/packages/third-party-reporter

I think there are changes to example repository but It doesn't reflect to docs.