incorrect handling of `-y` option in flatpak

I tried these two commands:

```
sudo UPT_TOOL=flatpak upt install -y org.onlyoffice.desktopeditors
sudo UPT_TOOL=flatpak upt install org.onlyoffice.desktopeditors -y
```

None of them worked.

I finally ended up using `sudo flatpak install -y org.onlyoffice.desktopeditors`
if a choice has to be made, I would prefer with the `-y` at the end