refactor: use renamed timezone utils

https://github.com/frappe/frappe/pull/20253

erpnext/utilities/doctype/video/video.py

@@ -10,6 +10,7 @@ import pytz
 from frappe import _
 from frappe.model.document import Document
 from frappe.utils import cint
+from frappe.utils.data import get_system_timezone
 from pyyoutube import Api
 
 
@@ -64,7 +65,7 @@ def update_youtube_data():
 
 	frequency = get_frequency(frequency)
 	time = datetime.now()
-	timezone = pytz.timezone(frappe.utils.get_time_zone())
+	timezone = pytz.timezone(get_system_timezone())
 	site_time = time.astimezone(timezone)
 
 	if frequency == 30: