Auto merge of #28960 - barosl:home-temp-dir-doc, r=alexcrichton
Auto merge of #28960 - barosl:home-temp-dir-doc, r=alexcrichton

This concern was raised by #28940.

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