Requirements update (#851)

* Requirements update

* Code change to tricker workers

* update

pkg/llms_from_scratch/ch02.py

@@ -33,6 +33,7 @@ class GPTDatasetV1(Dataset):
 
 def create_dataloader_v1(txt, batch_size=4, max_length=256,
                          stride=128, shuffle=True, drop_last=True, num_workers=0):
+
     # Initialize the tokenizer
     tokenizer = tiktoken.get_encoding("gpt2")