patch 8.2.2736: Vim9: for loop over string is a bit slow

Problem:    Vim9: for loop over string is a bit slow.
Solution:   Avoid using strlen().
diff --git a/src/version.c b/src/version.c
index f1534f1..4e6435c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2736,
+/**/
     2735,
 /**/
     2734,