Convert dataset sizes from base 2 to base 10 in the dataset card

Convert dataset sizes from base 2 (MiB) to base 10 (MB) in the dataset card, as it is the case in the dataset viewer.
See: https://github.com/huggingface/datasets/issues/5708

README.md

@@ -86,9 +86,9 @@ dataset_info:
 - **Repository:** https://github.com/EdinburghNLP/XSum
 - **Paper:** [Don't Give Me the Details, Just the Summary! Topic-Aware Convolutional Neural Networks for Extreme Summarization](https://arxiv.org/abs/1808.08745)
 - **Point of Contact:** [Shashi Narayan](mailto:[email protected])
-- **Size of downloaded dataset files:** 245.38 MB
-- **Size of the generated dataset:** 507.60 MB
-- **Total amount of disk used:** 752.98 MB
+- **Size of downloaded dataset files:** 257.30 MB
+- **Size of the generated dataset:** 532.26 MB
+- **Total amount of disk used:** 789.56 MB
 
 ### Dataset Summary
 
@@ -113,9 +113,9 @@ There are three features:
 
 #### default
 
-- **Size of downloaded dataset files:** 245.38 MB
-- **Size of the generated dataset:** 507.60 MB
-- **Total amount of disk used:** 752.98 MB
+- **Size of downloaded dataset files:** 257.30 MB
+- **Size of the generated dataset:** 532.26 MB
+- **Total amount of disk used:** 789.56 MB
 
 An example of 'validation' looks as follows.
 ```