Update link

internals/garbage-collector.rst

@@ -167,7 +167,7 @@ C APIs
 
 Specific APIs are offered to allocate, deallocate, initialize, track, and untrack
 objects with GC support. These APIs can be found in the `Garbage Collector C API
-documentation <https://docs.python.org/3.8/c-api/gcsupport.html>`_.
+documentation <https://docs.python.org/3/c-api/gcsupport.html>`_.
 
 Apart from this object structure, the type object for objects supporting garbage
 collection must include the ``Py_TPFLAGS_HAVE_GC`` in its ``tp_flags`` slot and