bug fixes

app.py

@@ -496,7 +496,7 @@ def get_all_currency():
 @app.get("/get_index_price/{index_name}")
 def get_index_price(index_name: str):
     r = requests.get(f"https://dps.psx.com.pk/timeseries/int/{index_name}")
-    response = IndexPrice.model_validate_json(r.json())
+    response = IndexPrice.model_validate(r.json())
 
     formatted_data = [
         DataIndex(