patch 8.2.3534: autoread test is a bit flaky

Problem:    Autoread test is a bit flaky.
Solution:   Wait a brief moment before overwriting the file.

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3534,
 /**/
     3533,
 /**/