When the title of ES.56 was changed, its entry in the ES ToC wasn't (#831)

CppCoreGuidelines.md

@@ -8736,7 +8736,7 @@ Expression rules:
 * [ES.49: If you must use a cast, use a named cast](#Res-casts-named)
 * [ES.50: Don't cast away `const`](#Res-casts-const)
 * [ES.55: Avoid the need for range checking](#Res-range-checking)
-* [ES.56: Avoid `std::move()` in application code](#Res-move)
+* [ES.56: Write `std::move()` only when you need to explicitly move an object to another scope](#Res-move)
 * [ES.60: Avoid `new` and `delete` outside resource management functions](#Res-new)
 * [ES.61: Delete arrays using `delete[]` and non-arrays using `delete`](#Res-del)
 * [ES.62: Don't compare pointers into different arrays](#Res-arr2)