patch 8.2.3708: Vim9: test fails with different error

Problem:    Vim9: test fails with different error.
Solution:   Correct the error number.
diff --git a/src/version.c b/src/version.c
index e29cb31..b26746b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3708,
+/**/
     3707,
 /**/
     3706,