update doc

Author: skywind3000

README.md

@@ -388,7 +388,7 @@ See: [Cooperate with famous plugins](https://github.com/skywind3000/asyncrun.vim
 
 ## History
 
-- 2.5.3 (2020-03-02): new `-silent` option to prevent open quickfix, add [command modifier](https://github.com/skywind3000/asyncrun.vim/wiki/Command-Modifier) to allow you change the command.
+- 2.5.3 (2020-03-02): new `-silent` option to prevent open quickfix, add [command modifier](https://github.com/skywind3000/asyncrun.vim/wiki/Command-Modifier).
 - 2.5.0 (2020-02-29): refactor, remove useless codes, new command modifier `g:asyncrun_program`.
 - 2.4.8 (2020-02-21): run with `:execute` if command is starting with colon.
 - 2.4.7 (2020-02-21): new customizable runners by `g:asyncrun_runner`, see [customize runner](https://github.com/skywind3000/asyncrun.vim/wiki/Customize-Runner).