Issue 9024: Added :cdata: tag to PyDateTimeAPI

Doc/c-api/datetime.rst

@@ -10,7 +10,8 @@ Before using any of these functions, the header file :file:`datetime.h` must be
 included in your source (note that this is not included by :file:`Python.h`),
 and the macro :cmacro:`PyDateTime_IMPORT` must be invoked, usually as part of
 the module initialisation function.  The macro puts a pointer to a C structure
-into a static variable,  ``PyDateTimeAPI``, that is used by the following macros.
+into a static variable, :cdata:`PyDateTimeAPI`, that is used by the following
+macros.
 
 Type-check macros: