Change term for PyMem_SetAllocator (again)

Author: ZeroIntensity

Doc/c-api/memory.rst

@@ -506,8 +506,8 @@ Customize Memory Allocators
          :c:func:`Py_InitializeFromConfig` to install a custom memory
          allocator. There are no restrictions over the installed allocator
          other than the ones imposed by the domain (for instance, the Raw
-         Domain allows the allocator to be called without the GIL held). See
-         :ref:`the section on allocator domains <allocator-domains>` for more
+         Domain allows the allocator to be called without an active :term:`thread state`).
+         See :ref:`the section on allocator domains <allocator-domains>` for more
          information.
 
        * If called after Python has finish initializing (after