Update the testing doc to be more clear and include dynamic link
Update the testing doc to be more clear and include dynamic link

Fixed some typos and changed the link to the link to crates-and-modules to be dynamic.

GBGamer/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,GBGamer/rust,aidancully/rust,graydon/rust,GBGamer/rust,aidancully/rust