About the json-server delay option

[Hosung99]

At the chapter 4, db.json file is supposed to be opened using the json-server package.
It is supposed to test the execution by specifying the --delay option at execution.
but i can't execute, and the error says 'Unknown option --delay'.
So when I looked it up, I found a document like this.
typicode/json-server#1534

it says delay option is removed at newest version.
so if you want to test with delay try this npm i [email protected]

This is my first time contributing to open source, please let me know if translation is awkward!