[doc] Bug Fix: Missing Entry for demi_timedwait()
#include <demi/wait.h>
#include <demi/types.h> /* For demi_qresult_t and demi_qtoken_t. */
-int demi_wait(demi_qresult_t *qr_out, demi_qtoken_t qt, struct timespec *timeout)
+int demi_wait(demi_qresult_t *qr_out, demi_qtoken_t qt, struct timespec *timeout);
+int demi_timedwait(demi_qresult_t *qr_out, demi_qtoken_t qt, const struct timespec *abstime);
int demi_wait_any(demi_qresult_t *qr_out, int *ready_offset, demi_qtoken_t qts[], int num_qts, struct timespec *timeout);
```
