Auto merge of #5020 - stefanbirkner:linkfix, r=alexcrichton
Auto merge of #5020 - stefanbirkner:linkfix, r=alexcrichton

Fix link to documentation

nipunn1313/cargo,tshepang/cargo,rustyhorde/cargo,rustyhorde/cargo,tsurai/cargo,tshepang/cargo,eminence/cargo,tshepang/cargo,nipunn1313/cargo,tshepang/cargo,rust-lang/cargo,tsurai/cargo,tsurai/cargo,rustyhorde/cargo,rust-lang/cargo,tsurai/cargo,rustyhorde/cargo,vojtechkral/cargo,vojtechkral/cargo,rust-lang/cargo,rust-lang/cargo,eminence/cargo,vojtechkral/cargo,nipunn1313/cargo,nipunn1313/cargo,vojtechkral/cargo,eminence/cargo,tsurai/cargo,eminence/cargo