Update README.md

Author: VolkanSah

README.md

@@ -63,6 +63,7 @@ You've successfully integrated the GPT API into your PHP website! Now, you can c
 - [Developer Site](https://volkansah.github.io)
 
 ### Other cool stuff for GPT!
+- [OpenAI Text-to-Speech Interface](https://github.com/VolkanSah/OpenAI-Text-to-Speech-Interface)
 - [ChatGPT ShellMaster (ChatGPT4 Plugin](https://github.com/VolkanSah/GPT-ShellMaster)
 - ['GPT Comment reply' Plugin for WordPress](https://github.com/VolkanSah/GPT-Comments-Reply-WordPress-Plugin)
 - [GPT over CLI](https://github.com/VolkanSah/GPT-over-CLI)