fixed typo in changelog

Author: jacobwilliams

CHANGELOG.md

@@ -37,7 +37,7 @@ or [Download v6.4.0](https://github.com/jacobwilliams/json-fortran/releases/tag/
 
 **Enhancements:**
 
-- Addition optional `stop_on_error` argument to the various `initialize()` routines to immediately stop the program if an exception is raised. [\#318](https://github.com/jacobwilliams/json-fortran/issues/318) [\#320](https://github.com/jacobwilliams/json-fortran/pull/320) ([jacobwilliams](https://github.com/jacobwilliams))
+- Added optional `stop_on_error` argument to the various `initialize()` routines to immediately stop the program if an exception is raised. [\#318](https://github.com/jacobwilliams/json-fortran/issues/318) [\#320](https://github.com/jacobwilliams/json-fortran/pull/320) ([jacobwilliams](https://github.com/jacobwilliams))
 
 - Added routines to check if a name key is present in a `json_file` object, which is also available using the `.in.` operator. [\#316](https://github.com/jacobwilliams/json-fortran/issues/316) [\#319](https://github.com/jacobwilliams/json-fortran/pull/319) ([jacobwilliams](https://github.com/jacobwilliams))