add pointer to new blog post with feedback

Go2GenericsFeedback.md

@@ -19,6 +19,8 @@ As the amount of feedback grows, please feel free to organize or reorganize this
 
 ## Supplemental (supporting with modifications)
 
+- Bryan Ford, "[Are Only Type Parameters Generic Enough for Go 2 Generics?](https://bford.info/2019/07/29/go-generics/)", July 2019
+
 - Herbert Dürr, "[Contract Switches to Steer Types to Common Outcomes](https://gist.github.com/hdu-hh/78ca8d3a40bda996c91ce9c1f558337c)", July 2019
 
 - Tom Levy, "[Go 2 Generics Feedback](https://gist.github.com/tom93/fd8c500b8a1d2d94f227e1e108d5315b)", June 2019
@@ -342,4 +344,4 @@ func main() {
     v:= IntStringHolder{}
     v.Set(7,"Lucky")
 }
-```
+```