patch 8.2.2314: Vim9: returning zero takes two instructions

Problem:    Vim9: returning zero takes two instructions.
Solution:   Add ISN_RETURN_ZERO.
diff --git a/src/version.c b/src/version.c
index 9e49e6d..7ab3b01 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2314,
+/**/
     2313,
 /**/
     2312,