Update README.md to include ISO codes for available languages

*** Include the ISO code for Moroccan Arabic/Darija ***

Source:

Wiki: https://en.wikipedia.org/wiki/Moroccan_Arabic
Hugging Face: https://huggingface.co/languages

README.md

@@ -1,6 +1,7 @@
 ---
 language:
-- ar
+- en
+- ary
 size_categories:
 - 10K<n<100K
 task_categories: