patch 8.2.1628: Vim9: cannot pass "true" to timer_paused()

Problem:    Vim9: cannot pass "true" to timer_paused().
Solution:   Use tv_get_bool(). (closes #6891)
diff --git a/src/time.c b/src/time.c
index 89ff08b..cc29d0d 100644
--- a/src/time.c
+++ b/src/time.c
@@ -742,7 +742,7 @@
 f_timer_pause(typval_T *argvars, typval_T *rettv UNUSED)
 {
     timer_T	*timer = NULL;
-    int		paused = (int)tv_get_number(&argvars[1]);
+    int		paused = (int)tv_get_bool(&argvars[1]);
 
     if (argvars[0].v_type != VAR_NUMBER)
 	emsg(_(e_number_exp));