docs: Fix typo in ExitStatus

Author: mkroening

library/std/src/process.rs

@@ -1417,7 +1417,7 @@ impl From<fs::File> for Stdio {
 /// For proper error reporting of failed processes, print the value of `ExitStatus` or
 /// `ExitStatusError` using their implementations of [`Display`](crate::fmt::Display).
 ///
-/// # Differences from `ExitStatus`
+/// # Differences from `ExitCode`
 ///
 /// `ExitCode` is intended for terminating the currently running process, via
 /// the `Termination` trait, in contrast to [`ExitStatus`], which represents the