Update start.sh

start.sh

@@ -3,4 +3,4 @@ redis-server --daemonize yes
 redis-cli config set save ""
 redis-cli config set appendonly no
 redis-cli config set stop-writes-on-bgsave-error no
-gunicorn -b 0.0.0.0:7860 --timeout 120 -k uvicorn.workers.UvicornWorker --workers 5 --threads 5 app:app
+gunicorn -b 0.0.0.0:7860 --timeout 120 --worker-class uvicorn.workers.UvicornWorker --workers 5 --threads 5 app:app