Auto merge of #11265 - hi-rustin:rustin-patch-missing, r=epage
Auto merge of #11265 - hi-rustin:rustin-patch-missing, r=epage

Add missing edition

When I read this doc, I found that we are missing the edition key in this manifest. I think we should add it because` cargo new` always does this.

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