Update evaluating_with_llamadatasets.md (#10371)

fix typo

docs/module_guides/evaluating/evaluating_with_llamadatasets.md

@@ -118,10 +118,10 @@ llamaindex-cli download-llamadataset PaulGrahamEssayDataset --download-dir ./dat
 
 ```python
 # using python
-from llama_index.llama_datasets import download_llama_datasets
+from llama_index.llama_dataset import download_llama_dataset
 
 # a LabelledRagDataset and a list of source Document's
-rag_dataset, documents = download_llama_datasets(
+rag_dataset, documents = download_llama_dataset(
     "PaulGrahamEssayDataset", "./data"
 )
 ```