Update app.py

app.py

@@ -14,7 +14,7 @@ df = df.sort_values(by="commit_dates")
 melted_df = pd.melt(df, id_vars=['commit_dates'], value_vars=['total_transformers_model', 'missing_library_name'], var_name='type')
 
 df['ratio'] = (1 - df['missing_library_name'] / df['total_transformers_model']) * 100
-ratio_df = df = df[['commit_dates', 'ratio']].copy()
+ratio_df = df[['commit_dates', 'ratio']].copy()
 
 def make_plot(plot_type):
     if plot_type == "Total models with missing 'transformers' tag":