Fix typos in `mruby/presym/{disable,enable}.h` [ci skip]
MODIFY
include/mruby/presym/disable.h
include/mruby/presym/disable.h
/**
-** @file mruby/presym/scanning.h - Disable Preallocated Symbols
+** @file mruby/presym/disable.h - Disable Preallocated Symbols
**
** See Copyright Notice in mruby.h
*/

MODIFY
include/mruby/presym/enable.h
include/mruby/presym/enable.h
/**
-** @file mruby/presym/scanning.h - Enable Preallocated Symbols
+** @file mruby/presym/enable.h - Enable Preallocated Symbols
**
** See Copyright Notice in mruby.h
*/

Fix typos in `mruby/presym/{disable,enable}.h` [ci skip]