Fix section number for Transaction-Safe Function

The section number for `Transaction-Safe Function` should be "5.1.4.6", one more than `Lifetime-Extended Temporaries`.

Author: Saldivarcher

abi.html

@@ -4581,7 +4581,7 @@ <h5><a href="#mangling-special-temporaries"> 5.1.4.5 Lifetime-Extended Temporari
 
 <p>
 <a name="mangling-transaction-safe">
-<h5><a href="#mangling-transaction-safe"> 5.1.4.5 Transaction-Safe Function
+<h5><a href="#mangling-transaction-safe"> 5.1.4.6 Transaction-Safe Function
 Entry Points</a></h5> A function declared transaction-safe or
 [[optimize_for_synchronized]] has two entry points: the normal function
 mangling, used for calls from a non-transaction context, and another entry