replace what I think is an erroneous try_run_quiet by try_run

Author: RalfJung

src/bootstrap/test.rs

@@ -1527,7 +1527,7 @@ impl Step for RustcGuide {
     fn run(self, builder: &Builder<'_>) {
         let src = builder.src.join("src/doc/rustc-guide");
         let mut rustbook_cmd = builder.tool_cmd(Tool::Rustbook);
-        try_run_quiet(builder, rustbook_cmd.arg("linkcheck").arg(&src));
+        try_run(builder, rustbook_cmd.arg("linkcheck").arg(&src));
     }
 }