fix import error

pages/supervised_unsupervised_page.py

@@ -343,7 +343,7 @@ if learning_type == "Supervised Learning":
         
     elif sl_usecase == "Customer churn prediction ❌":
         #st.warning("This page is under construction")
-        path_churn = r"data\classification\churn"
+        path_churn = r"data/classification/churn"
 
         ## Description of the use case
         st.divider()