C++: Change note.

change-notes/1.24/analysis-cpp.md

@@ -45,6 +45,7 @@ The following changes in version 1.24 affect C/C++ analysis in all applications.
     `StackVariableReachability`. The functionality is the same.
 * The models library models `strlen` in more detail, and includes common variations such as `wcslen`.
 * The models library models `gets` and similar functions.
+* The models library now partially models `std::string`.
 * The taint tracking library (`semmle.code.cpp.dataflow.TaintTracking`) has had
   the following improvements:
   * The library now models data flow through `strdup` and similar functions.