patch 8.2.3212: Vim9: execution speed can be improved

Problem:    Vim9: execution speed can be improved.
Solution:   Use __builtin_expect() to have the compiler produce better code.
            (Dominique Pellé, closes #8613)

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3212,
 /**/
     3211,
 /**/