Update app.py

Author: CoderCpy

streamlit/flight_routes/app.py

@@ -24,7 +24,7 @@ def read_csv(url):
 df_routes = read_csv(csv_url)
 
 
-# This .csv file was created within flights_table_builder.ipynb, by using python code 
+# This .csv file was created within flights_data.ipynb, by using python code 
 #to download, convert file type, merge and clean the data. 
 
 def value_change(category):