Updated README badges

Removed ThorVGPT badge from README.
Added CodeFactor badge.

Author: hermet

README.md

@@ -1,5 +1,5 @@
+[![CodeFactor](https://www.codefactor.io/repository/github/thorvg/thorvg.example/badge)](https://www.codefactor.io/repository/github/thorvg/thorvg.example)
 [![License](https://img.shields.io/badge/licence-MIT-green.svg?style=flat)](LICENSE)
-[![ThorVGPT](https://img.shields.io/badge/ThorVGPT-76A99C?style=flat&logo=openai&logoColor=white)](https://chat.openai.com/g/g-Ht3dYIwLO-thorvgpt)
 [![Discord](https://img.shields.io/badge/Community-5865f2?style=flat&logo=discord&logoColor=white)](https://discord.gg/n25xj6J6HM)
 [![OpenCollective](https://img.shields.io/badge/OpenCollective-84B5FC?style=flat&logo=opencollective&logoColor=white)](https://opencollective.com/thorvg)
 <br>