patch 8.1.1289: may not have enough space to add "W" to search stats

Problem:    May not have enough space to add "W" to search stats.
Solution:   Reserve a bit more space. (Christian Brabandt)

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1289,
 /**/
     1288,
 /**/