patch 8.2.2311: Vim9: cannot assign to variable that shadows command modifier

Problem:    Vim9: cannot assign to a variable that shadows a command modifier.
Solution:   Check for assignment after possible command modifier.
            (closes #7632)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2311,
 /**/
     2310,
 /**/