patch 8.2.2796: Vim9: redir to variable does not accept an index

Problem:    Vim9: redir to variable does not accept an index.
Solution:   Make the index work.
diff --git a/src/version.c b/src/version.c
index 18d6c80..a723859 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2796,
+/**/
     2795,
 /**/
     2794,