Auto merge of #25761 - ralexstokes:master, r=steveklabnik

Typo in explanation of difference between stack and heap values.  

`baz` is called at the end of a call to `bar` inside another call to `foo`.  `baz` takes a copy of the value `e` which should have a value of 9 if following the rest of the stack trace.

This PR fixes this typo and should close #25635.

Author: bors

src/doc/trpl/the-stack-and-the-heap.md

@@ -454,7 +454,7 @@ At the end of `bar()`, it calls `baz()`:
 | (2<sup>30</sup>) - 1 |      | 5                    |
 | ...                  | ...  | ...                  |
 | 12                   | g    | 100                  |
-| 11                   | f    | 4                    |
+| 11                   | f    | 9                    |
 | 10                   | e    | 9                    |
 | 9                    | d    | (2<sup>30</sup>) - 1 |
 | 8                    | c    | 5                    |