Auto merge of #9928 - ehuss:contrib-githelp, r=alexcrichton
Auto merge of #9928 - ehuss:contrib-githelp, r=alexcrichton

Remove broken link in contrib docs.

I don't think this point is particularly important, so I'm just removing it.

rust-lang/cargo,rustyhorde/cargo,eminence/cargo,eminence/cargo,nipunn1313/cargo,rustyhorde/cargo,eminence/cargo,nipunn1313/cargo,rust-lang/cargo,nipunn1313/cargo,rustyhorde/cargo,eminence/cargo,rust-lang/cargo,rust-lang/cargo,nipunn1313/cargo,rustyhorde/cargo