Fix _mi_last_option

Author: octavonce

libmimalloc-sys/src/extended.rs

@@ -579,7 +579,7 @@ pub const mi_option_segment_decommit_delay: mi_option_t = 23;
 pub const mi_option_decommit_extend_delay: mi_option_t = 24;
 
 /// Last option.
-pub const _mi_option_last: mi_option_t = 25;
+pub const _mi_option_last: mi_option_t = 26;
 
 extern "C" {
     // Note: mi_option_{enable,disable} aren't exposed because they're redundant