bpo-36465: Update doc of init_config.rst (GH-18520)

diff --git a/Doc/c-api/init_config.rst b/Doc/c-api/init_config.rst
index c589a6f..a226814 100644
--- a/Doc/c-api/init_config.rst
+++ b/Doc/c-api/init_config.rst
@@ -472,7 +472,7 @@
 
       If non-zero, dump all objects which are still alive at exit.
 
-      Require a debug build of Python (``Py_REF_DEBUG`` macro must be defined).
+      ``Py_TRACE_REFS`` macro must be defined in build.
 
    .. c:member:: wchar_t* exec_prefix