Update files from the datasets library (from 1.6.0)

Release notes: https://github.com/huggingface/datasets/releases/tag/1.6.0

README.md

@@ -159,7 +159,7 @@ languages:
 - mt
 - mus
 - my
-- nan
+- 'nan'
 - nap
 - nb
 - nds
@@ -253,7 +253,26 @@ licenses:
 multilinguality:
 - multilingual
 size_categories:
-- 10K<n<100K
+  as-bs:
+  - 1K<n<10K
+  az-cs:
+  - n<1K
+  bg-de:
+  - n<1K
+  bn-ga:
+  - 1K<n<10K
+  br-es_PR:
+  - n<1K
+  br-hi:
+  - 10K<n<100K
+  br-la:
+  - n<1K
+  br-uz:
+  - 1K<n<10K
+  br-yi:
+  - 1K<n<10K
+  bs-szl:
+  - n<1K
 source_datasets:
 - original
 task_categories: