Right no objects found message for new stock transfer

Found in 2-3-stable, but also in master.

When you add a new stock transfer you have to add variants.
Onload the page always shows an message, because you didn't add variants yet.
The message said: `No Stock Transfers found, Add One!`

The `Add One` link went to `new_admin_tax_rate_path`.

I think this is just a copy-paste mistake.

I corrected it and now it says `No Variants found.`.