Fix lineup replacement logic in load_contest_file function

- Updated the method for replacing position indicators in the cleaned dataframe from `str.replace` to `replace`, enhancing the accuracy of lineup processing.
- This change contributes to ongoing efforts to refine data handling and improve user experience within the application.

global_func/load_contest_file.py

@@ -41,7 +41,7 @@ def load_contest_file(upload, sport):
             
             # Create the cleaned dataframe with just the essential columns
             cleaned_df = df[['BaseName', 'EntryCount', 'Lineup']]
-            cleaned_df['Lineup'] = cleaned_df['Lineup'].str.replace(pos_list, ',')
+            cleaned_df['Lineup'] = cleaned_df['Lineup'].replace(pos_list, ',')
             
             # Get unique entry names
             entry_list = list(set(df['BaseName']))