Update README.md

Example of usage:

```python
from datasets import load_dataset

dataset = load_dataset("Andron00e/CIFAR10-custom")
splitter_dataset = dataset["train"].train_test_split(test_size=0.2)
```

README.md

@@ -9,14 +9,20 @@ dataset_info:
     dtype: uint8
   splits:
   - name: train
-    num_bytes: 59153400.0
+    num_bytes: 59153400
     num_examples: 60000
   download_size: 26957572
-  dataset_size: 59153400.0
+  dataset_size: 59153400
 configs:
 - config_name: default
   data_files:
   - split: train
     path: data/train-*
----
-  
+license: mit
+task_categories:
+- image-classification
+language:
+- en
+size_categories:
+- 10K<n<100K
+---