docs: add fnproject to gin's user list (#1505)

README.md

@@ -1885,5 +1885,6 @@ func TestPingRoute(t *testing.T) {
 
 Awesome project lists using [Gin](https://github.com/gin-gonic/gin) web framework.
 
-* [drone](https://github.com/drone/drone): Drone is a Continuous Delivery platform built on Docker, written in Go
+* [drone](https://github.com/drone/drone): Drone is a Continuous Delivery platform built on Docker, written in Go.
 * [gorush](https://github.com/appleboy/gorush): A push notification server written in Go.
+* [fnproject](https://github.com/fnproject/fn): The container native, cloud agnostic serverless platform.