Auto merge of #10946 - RalfJung:docs, r=epage
Auto merge of #10946 - RalfJung:docs, r=epage

resolver docs: link to version requirements syntax full explanation

Staring at https://doc.rust-lang.org/cargo/reference/resolver.html#semver-compatibility, I was confused was this is a "refresher" for. Let's add a link to the main documentation this summarizes.

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