Auto merge of #4480 - integer32llc:explain-labels, r=matklad
Auto merge of #4480 - integer32llc:explain-labels, r=matklad

Add an explanation of the labels

As requested @matklad! ❤️ Are there any questions you have about the labels that remain unanswered?

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