Update requirements.txt

requirements.txt

@@ -11,3 +11,7 @@ accelerate==0.20.3
 xformers==0.0.20
 numpy>=1.21.0,<1.27.0
 librosa==0.10.0
+kokoro>=0.8.2
+soundfile
+# Uncomment the following line if the "spaces" package is not already available in your environment:
+spaces