docs: Link to ExitCode instead of ExitStatus in ExitStatus

Author: mkroening

library/std/src/process.rs

@@ -1419,8 +1419,8 @@ impl From<fs::File> for Stdio {
 ///
 /// # Differences from `ExitCode`
 ///
-/// `ExitCode` is intended for terminating the currently running process, via
-/// the `Termination` trait, in contrast to [`ExitStatus`], which represents the
+/// [`ExitCode`] is intended for terminating the currently running process, via
+/// the `Termination` trait, in contrast to `ExitStatus`, which represents the
 /// termination of a child process. These APIs are separate due to platform
 /// compatibility differences and their expected usage; it is not generally
 /// possible to exactly reproduce an ExitStatus from a child for the current