readme: Converted for Tensorflow
  
  ```
  !pip install transformers sentencepiece
  from transformers import TFAutoModel, AutoTokenizer
  name = "ai4bharat/indic-bert"
  model = TFAutoModel.from_pretrained(name, from_pt=True)
  tokenizer = AutoTokenizer.from_pretrained(name)
  model.save_pretrained("local-indic-bert")
  tokenizer.save_pretrained("local-indic-bert")
  ```
  