Update readme with finite map limitation

Author: lafriks

README.md

@@ -3,7 +3,7 @@
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/lafriks/go-tiled)](https://pkg.go.dev/github.com/lafriks/go-tiled)
 [![Build Status](https://cloud.drone.io/api/badges/lafriks/go-tiled/status.svg?ref=refs/heads/master)](https://cloud.drone.io/lafriks/go-tiled)
 
-Go library to parse Tiled map editor file format (TMX) and render map to image. Currently supports only orthogonal rendering out-of-the-box.
+Go library to parse Tiled map editor file format (TMX) and render map to image. Currently supports only orthogonal finite maps rendering out-of-the-box.
 
 ## Installing