patch 8.1.0758: font number is always one instead of the actual

Problem:    Font number is always one instead of the actual.
Solution:   Use "%d" instead of "1". (Ken Takata)

src/version.c

@@ -795,6 +795,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    758,
 /**/
     757,
 /**/