add a heads up in reademe for value.sh issue

[zacKolton]

This is for people (like myself) that are lazy and just store the whole .zip file in the widgets folder.

I found a bug where, if you do the above, the widget will not display anything.

Solution, update the class paths you see in the index.coffee file.

Example:
src="./airpods-battery-widget-master/airpods-battery.widget/... will not work

You need to add the parent folder: airpods-battery-widget-master to the path.

Here is a visual:

command: "./airpods-battery.widget/values.sh #{MAC_ADDRESS}"

Should be

command: "./airpods-battery-widget-master/airpods-battery.widget/values.sh #{MAC_ADDRESS}"

Aside, make sure you extract the .zip folder first.

Hope this helps people