patch 8.2.1572: Vim9: expand() does not take "true" as argument

Problem:    Vim9: expand() does not take "true" as argument.
Solution:   Use tv_get_bool_chk().  (closes #6819)
diff --git a/src/version.c b/src/version.c
index 9399221..c674148 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1572,
+/**/
     1571,
 /**/
     1570,