patch 8.2.1624: Vim9: cannot pass "true" to split(), str2nr() and strchars()

Problem:    Vim9: cannot pass "true" to split(), str2nr() and strchars().
Solution:   Use tv_get_bool_chk(). (closes #6884, closes #6885, closes #6886)
diff --git a/src/version.c b/src/version.c
index ae775d9..6a6d994 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1624,
+/**/
     1623,
 /**/
     1622,