patch 8.2.1275: Vim9: compiler warning for buffer size

Problem:    Vim9: compiler warning for buffer size.
Solution:   Change the offset from 10 to 15. (Dominique Pellé, closes #6518)
diff --git a/src/version.c b/src/version.c
index 82b5780..3489c45 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1275,
+/**/
     1274,
 /**/
     1273,