Revise ko-fi link description in README

Updated the description for the ko-fi link to include options for change logs and support.

Author: ptsource

README.md

@@ -4,7 +4,7 @@ Virtual reality (VR) is an interactive computer-generated experience taking plac
 
 # PTSource VRGrid
 ### Current version 10 Final for Windows
-#### [![ko-fi](/images/ko-fi.png)](https://ko-fi.com/ptsource) For updates and change logs.
+#### [![ko-fi](/images/ko-fi.png)](https://ko-fi.com/ptsource) For updates, change logs or to buy us a coffee.
 
 PTSource VRGrid is a standards-based desktop application for Windows x86 and x64 designed for creating and representing interactive 3D and 2D environments with VR support within a versatile cuboid engine. It features its own scripting language for intuitive software design and support for its own 3D model format. Built with simplicity, generality, and usability in mind, PTSource VRGrid empowers users to easily create immersive virtual experiences and interactive designs with minimal complexity.