patch 8.2.0483: Vim9: "let x = x + 1" does not give an error

Problem:    Vim9: "let x = x + 1" does not give an error.
Solution:   Hide the variable when compiling the expression.
diff --git a/src/version.c b/src/version.c
index 2e8420c..79d50ee 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    483,
+/**/
     482,
 /**/
     481,