Fix the list

Author: ZeroIntensity

peps/pep-0788.rst

@@ -428,7 +428,7 @@ existing and new ``PyThreadState`` APIs.
 3. :c:func:`PyGILState_GetThisThreadState`: use :c:func:`PyThreadState_Get` or
    :c:func:`PyThreadState_GetUnchecked` instead.
 4. :c:func:`PyGILState_Check`: use ``PyThreadState_GetUnchecked() != NULL``
-  instead.
+   instead.
 
 These APIs will be removed from public C API headers in Python 3.20 (five years
 from now). They will remain available in the stable ABI for compatibility.