Update fetch_prices.py

fetch_prices.py

@@ -135,7 +135,7 @@ app = graph.compile()
 # ================================
 urls = ["https://mapia.pk/material-rates"]
 REFRESH_INTERVAL_MINUTES = 0.5  # every 30 seconds
-JSON_FILE = os.path.join(os.getcwd(), "material_rates_history.json"
+JSON_FILE = os.path.join(os.getcwd(), "material_rates_history.json")
 # =======================================================
 # ⚙️ Helper function to safely load JSON data
 # This prevents the JSONDecodeError during the initial import/startup.