Update requirements.txt

The error indicates that pyttsx3 is trying to use the eSpeak speech synthesizer, but it can't find the libespeak.so.1 library. This is a common issue when running on systems that don't have eSpeak installed. As a solution, we can use an alternative text-to-speech library that doesn't have this dependency, such as gTTS (Google Text-to-Speech). Updated gTTS

requirements.txt

@@ -2,5 +2,5 @@ transformers
 torch
 gradio
 moviepy
-pyttsx3
+gtts
 diffusers