I use Adsense ads on a Blogger site that is pointed toward a GoDaddy custom domain. I am getting warnings that I have to "fix some ads.txt file issues". Adsense says I need to "download an ads.txt file then upload the file to the root level domain of each site". I have done this on my Blogger site, but I have no idea how to add it to my GoDaddy custom domain associated with the Blogger site. Does anyone have some suggestions?