patch 8.2.5028: syntax regexp matching can be slow

Problem:    Syntax regexp matching can be slow.
Solution:   Adjust the counters for checking the timeout to check about once
            per msec. (closes #10487, closes #2712)

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5028,
 /**/
     5027,
 /**/