Update app/tasks.py

app/tasks.py

@@ -12,7 +12,7 @@ EXPORT_DIR = Path("/data/exports")
 EXPORT_DIR.mkdir(parents=True, exist_ok=True)
 
 @celery_app.task(bind=True)
-def generate_pptx(self, title: str = "GrowthOps Report", items: list[str] = None):
+def generate_pptx(self, title: str = "GrowthOps Report", items: list[str] | None = None):
     items = items or ["Overview", "Tenants", "Usage", "Jobs"]
     prs = Presentation()
     title_slide_layout = prs.slide_layouts[0]