Fixing ruff format.

src/pipecat/runner/run.py

@@ -240,7 +240,7 @@ def _add_lifespan_to_app(app: FastAPI, new_lifespan):
         app: The FastAPI application instance
         new_lifespan: The new lifespan context manager to add
     """
-    if hasattr(app.router, 'lifespan_context') and app.router.lifespan_context is not None:
+    if hasattr(app.router, "lifespan_context") and app.router.lifespan_context is not None:
         # If there's already a lifespan context, combine them
         existing_lifespan = app.router.lifespan_context