chore: fix broken HuggingFace wikitext dataset link (#4067)

Author: jackye1995

docs/examples/Python/llm_dataset_creation.rst

@@ -8,7 +8,7 @@ all of it on the disk at once. This becomes a considerable problem when you just
 In this example, we will be bypassing this problem by downloading a text dataset in parts, tokenizing it and saving it as a Lance dataset. 
 This can be done for as many or as few data samples as you wish with average memory consumption approximately 3-4 GBs!
 
-For this example, we are working with the `wikitext <https://huggingface.co/datasets/wikitext>`_ dataset, 
+For this example, we are working with the `wikitext <https://huggingface.co/datasets/Salesforce/wikitext>`_ dataset,
 which is a collection of over 100 million tokens extracted from the set of verified Good and Featured articles on Wikipedia.
 
 Preparing and pre-processing the raw dataset