patch 8.2.1611: Vim9: cannot pass "true" to nr2char()

Problem:    Vim9: cannot pass "true" to nr2char().
Solution:   use tv_get_bool_chk(). (closes #6878)
diff --git a/src/version.c b/src/version.c
index a8cf168..bcece94 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1611,
+/**/
     1610,
 /**/
     1609,