Rollup merge of #35239 - dns2utf8:doc_park_timeout, r=steveklabnik
Rollup merge of #35239 - dns2utf8:doc_park_timeout, r=steveklabnik

Doc `std::thread::park_timeout`

r? @steveklabnik

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