Update URL to get rust builds from

Changed in rust-lang/rust#46354

Author: aidanhs

src/toolchain.rs

@@ -14,7 +14,7 @@ use util;
 
 const RUSTUP_BASE_URL: &'static str = "https://static.rust-lang.org/rustup/dist";
 
-const RUST_CI_TRY_BASE_URL: &'static str = "https://rust-lang-ci.s3.amazonaws.com/rustc-builds-try";
+const RUST_CI_TRY_BASE_URL: &'static str = "https://rust-lang-ci.s3.amazonaws.com/rustc-builds";
 const RUST_CI_MASTER_BASE_URL: &'static str = "https://rust-lang-ci.s3.amazonaws.com/rustc-builds";
 
 const RUST_CI_COMPONENTS: [(&'static str, &'static str); 3] =