Update shopping_list_with_grocy.py

[rachaelbond]

This fixes the issue #11 where the product name contains either one or two trailing spaces. Although the sensors were being created correctly, the data for the second sensor overwrote the first. This PR creates a distinct sensor name for the second sensor

[Anrolosia]

I'm working on a more generic way, this is too specific. I'll try to have something soon