Typo in README.md of javascript-exercises

[thuang3316]

Under How To Use These Exercises,

Item four 4.Each exercise includes the following:

On the third line of the paragraph starting with 'To complete an exercise ...',

'run npm rest helloWorld' should be 'run npm test helloWorld'.

[CouchofTomato]

Are you wanting to work on this?

[thuang3316]

Of course. Should I just fix it and open a pull request? @CouchofTomato

[mao-sz]

Go for it @thuang3316
Since you selected a blank issue, it didn't include the usual checkboxes we have where one would be to indicate if you'd like to be assigned or not