Made a note of a potential link breakage

This change isn't a great fix, however it is to note it for someone that knows how to fix this issue in python.
NZBX already provides a property with the NZB url, there is no need to rebuild this. The url param is nzb but the 
issue is that all of the slashes have back slashes. Its safer to fix that issue rather than rebuilding a url.

I.e. https:\/\/google.com\/ Should become: https://google.com/