Changed error to warning

Author: jkwakman

.github/workflows/validate.py

@@ -37,7 +37,7 @@ def validate_csv(file_path):
 
     # Check if 'Cookie / Data Key name' column contains unique values
     if not df['Cookie / Data Key name'].is_unique:
-        print("::error file=open-cookie-database.csv,line=1,col=1::'Cookie / Data Key name' contains none unique values. Please check for duplicates.")
+        print("::warning file=open-cookie-database.csv,line=1,col=1::'Cookie / Data Key name' contains none unique values. Please check for duplicates.")
 
         non_unique = df[df.duplicated('Cookie / Data Key name')]['Cookie / Data Key name']
         print("Non-unique values are:")