Update flex multipliers in Streamlit app to increase RB and WR values, enhancing accuracy in player evaluations across scoring formats.

src/streamlit_app.py

@@ -81,14 +81,14 @@ flex_multipliers = {
     },
     'PPR': {    
         'QB': 2,
-        'RB': 2,
+        'RB': 3,
         'WR': 3,
         'TE': 2,
     },
     'Standard': {
         'QB': 2,
         'RB': 3,
-        'WR': 2,
+        'WR': 3,
         'TE': 2,
     },
     'Superflex': {