Rollup merge of #36225 - johnthagen:fix-nightly-docs, r=steveklabnik
Rollup merge of #36225 - johnthagen:fix-nightly-docs, r=steveklabnik

Update nightly docs supported Windows versions to match Getting Started page

https://doc.rust-lang.org/book/getting-started.html#tier-1 shows that Windows 7+ is officially supported (implying, for example Windows 10), but the nightly page only listed 7, 8, and Server 2008 R2).

graydon/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust