patch 8.2.4311: Vim9: changing script variable type not caught compile time

Problem:    Vim9: changing script variable type not caught at compile time.
Solution:   Set the declared type.
diff --git a/src/version.c b/src/version.c
index 20bc28a..2342462 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4311,
+/**/
     4310,
 /**/
     4309,