add redirect to fix broken link (#8114)
add redirect to fix broken link (#8114)

* add redirect to fix broken link

* Add redirects for other broken overview anchors

And moved the author's redirect to colocate it with other overview redirect.

* Add missing comma

Co-authored-by: Dinesh Pandiyan <20897439f04948be218eb4e774063d3e8ab67b48@gmail.com>
keystonejs/keystone,keystonejs/keystone,keystonejs/keystone