chore: Update python3.def using stable_abi.toml from the latest main (#55)

Author: github-actions[bot]

src/python3.def

@@ -744,6 +744,7 @@ PyObject_HasAttrWithError
 PyObject_HasAttrStringWithError
 PyMapping_HasKeyWithError
 PyMapping_HasKeyStringWithError
+Py_IsFinalizing
 PyBaseObject_Type DATA
 PyBool_Type DATA
 PyByteArrayIter_Type DATA
@@ -856,7 +857,6 @@ _Py_NoneStruct DATA
 _Py_NotImplementedStruct DATA
 _Py_SwappedOp DATA
 _Py_TrueStruct DATA
-PY_TIMEOUT_MAX DATA
 PyModuleDef_Type DATA
 PyExc_ModuleNotFoundError DATA
 PyExc_BlockingIOError DATA