patch 8.2.2670: Vim9: error for append(0, text)

Problem:    Vim9: error for append(0, text).
Solution:   Check for negative number. (closes #8022)
diff --git a/src/version.c b/src/version.c
index 00d2fd7..1f389e9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2670,
+/**/
     2669,
 /**/
     2668,