Update requirements.txt

requirements.txt

@@ -1,6 +1,6 @@
-pandas>=1.3.4
-numpy>=1.23.3
-scikit-learn>=1.1.2
-xgboost>=1.5.0
-gradio>=3.20.1
+pandas >=1.3.4
+numpy >=1.23.3
+scikit-learn >=1.1.2
+xgboost >=1.5.0
+gradio >=3.20.1
 joblib >=1.1.0