Update app.py

app.py

@@ -33,7 +33,7 @@ Eine kreative {channel}-Kampagne für {product}, z. B. mit exklusiven Angebote
 
 def add_campaign(name, goal, product, channel, start, end, budget, responsible):
     if not isinstance(start, datetime) or not isinstance(end, datetime):
-    return pd.DataFrame(campaigns), "❌ Ungültiges Datum."
+        return pd.DataFrame(campaigns), "❌ Ungültiges Datum."
     campaigns.append({
         "Name": name,
         "Ziel": goal,