Update comment in posixmodule.c (GH-5681)

A closing parentheses was missing.

Signed-off-by: Ngie Cooper <[email protected]>
(cherry picked from commit 7745ec4)

Co-authored-by: ngie-eign <[email protected]>

Author: miss-islington

Modules/posixmodule.c

@@ -5780,7 +5780,7 @@ os_sched_getaffinity_impl(PyObject *module, pid_t pid)
 #ifdef HAVE_STROPTS_H
 #include <stropts.h>
 #endif
-#endif /* defined(HAVE_OPENPTY) || defined(HAVE_FORKPTY) || defined(HAVE_DEV_PTMX */
+#endif /* defined(HAVE_OPENPTY) || defined(HAVE_FORKPTY) || defined(HAVE_DEV_PTMX) */
 
 
 #if defined(HAVE_OPENPTY) || defined(HAVE__GETPTY) || defined(HAVE_DEV_PTMX)