Actually, there is a better way to edit the compliments instead of changing in the config.js

Go to this path and type the command -

cd /MagicMirror/modules/default/compliments
sudo nano compliments.js

Edit the 4 different session of the day and customize different greeting as much as you like.

In addition, you can change the compliments refresh rate at the

updateInterval: 30000,    //change the value from 30000 to 10000 to see the different

Enjoy!