[docs] [issue37878] Sub-Interpreters : Document PyThreadState_DeleteCurrent()

Change by Joannah Nanjekye <nanjekyejoannah@gmail.com>: ---------- title: Sub-ineterpreters : Document PyThreadState_DeleteCurrent() ? -> Sub-Interpreters : Document PyThreadState_DeleteCurrent() _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue37878> _______________________________________