auto merge of #19882 : steveklabnik/rust/fix_download, r=nikomatsakis

Thank you, @Ap0ph1s.

Author: bors

src/doc/guide.md

@@ -30,9 +30,10 @@ $ curl -s https://static.rust-lang.org/rustup.sh | sudo sh
 below.)
 
 If you're on Windows, please download either the [32-bit
-installer](https://static.rust-lang.org/dist/rust-nightly-i686-w64-mingw32.exe)
+installer](https://static.rust-lang.org/dist/rust-nightly-i686-pc-windows-gnu.exe)
+
 or the [64-bit
-installer](https://static.rust-lang.org/dist/rust-nightly-x86_64-w64-mingw32.exe)
+installer](https://static.rust-lang.org/dist/rust-nightly-x86_64-pc-windows-gnu.exe)
 and run it.
 
 If you decide you don't want Rust anymore, we'll be a bit sad, but that's okay.