Add NFL support for lineup cleaning in load_contest_file.py

- Enhanced the lineup cleaning logic to include NFL sport, ensuring consistent formatting by replacing ' FLEX ' and 'CPT ' with a comma in the lineup data.
- Maintained existing functionality for NHL and GOLF sports, improving overall data handling for contest files.

global_func/load_contest_file.py

@@ -159,6 +159,8 @@ def load_contest_file(upload, type, helper = None, sport = None, portfolio = Non
             elif type == 'Showdown':
                 if sport == 'NHL':
                     cleaned_df['Lineup'] = cleaned_df['Lineup'].replace([' FLEX ', 'CPT '], value=',', regex=True)
+                if sport == 'NFL':
+                    cleaned_df['Lineup'] = cleaned_df['Lineup'].replace([' FLEX ', 'CPT '], value=',', regex=True)
                 if sport == 'GOLF':
                     cleaned_df['Lineup'] = cleaned_df['Lineup'].replace([' G ', 'G '], value=',', regex=True)
                 elif sport == 'NAS':