Update ucf101_sample.yaml

configs/ucf101/ucf101_sample.yaml

 # path:
 ckpt:
 save_img_path: "./sample_videos/"
-pretrained_model_path: "/path/to/pretrained/Latte/"
+pretrained_model_path: "pretrained_models"
 
 # model config: 
 model: Latte-XL/2