First, are you trying this in the Auto Responder feature of the Form?
Are you trying to display a link to the attachment, which you can get by just select the UploadFile field and insert the value (e.g. $$value:UploadControl$$). The URL I got is something like this /CMSPages/GetBizFormFile.aspx?filename=71177384-ba70-4901-80fe-4161a7dab5e1.jpg&sitename=DancingGoat (for V10), not sure why your format needs the "/CMSModules/BizForms" part.
Or are you trying to convert into something like <img src="/..../{% URL %}" />
so the image displays in the email?
If the second option, you can use {% Substring(UploadControl, 0, IndexOf(UploadControl, "/")) %}
so it will trim 7bb05492-0f0c-438d-93dd-5f84a748de2f.jpg/ice-council-banner-tablet.jpg to 7bb05492-0f0c-438d-93dd-5f84a748de2f.jpg, then just add /CMSPages/GetBizFormFile.aspx?filename= in front of that