Update Include/internal/pycore_dict.h

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: corona10

Include/internal/pycore_dict.h

@@ -149,6 +149,7 @@ extern int _PyDict_GetItemRef_KnownHash(PyDictObject *op, PyObject *key, Py_hash
 extern int _PyDict_GetItemRef_Unicode_LockHeld(PyDictObject *op, PyObject *key, PyObject **result);
 PyAPI_FUNC(int) _PyObjectDict_SetItem(PyTypeObject *tp, PyObject *obj, PyObject **dictptr, PyObject *name, PyObject *value);
 
+// Export for '_testinternalcapi' shared extension
 PyAPI_FUNC(int) _PyFrozenDict_GetItemRef(PyObject *op, PyObject *key, PyObject **result);
 
 extern int _PyDict_Pop_KnownHash(