Update requirements.txt

requirements.txt

@@ -2,6 +2,7 @@ gradio>=3.50
 pandas>=2.0
 numpy>=1.24
 scipy>=1.10
+scikit-learn>=1.0  # <-- This is the missing package
 tensorflow-cpu>=2.13
 matplotlib>=3.7
-protobuf<4.0.0  # Fix compatibility with TensorFlow
+protobuf<4.0.0