Create README.md (#7299)

* Create README.md

* language metadata
Co-authored-by: Julien Chaumond <chaumond@gmail.com>

model_cards/adalbertojunior/PTT5-SMALL-SUM/README.md

+---
+- language: pt
+---
+
+# PTT5-SMALL-SUM
+
+## Model description
+
+This model was trained to summarize texts in portuguese
+
+
+based on ```unicamp-dl/ptt5-small-portuguese-vocab```
+
+#### How to use
+
+```python
+from transformers import T5Tokenizer, T5ForConditionalGeneration
+
+tokenizer = T5Tokenizer.from_pretrained('adalbertojunior/PTT5-SMALL-SUM')
+
+t5 = T5ForConditionalGeneration.from_pretrained('adalbertojunior/PTT5-SMALL-SUM')
+
+text="Esse é um exemplo de sumarização."
+
+input_ids = tokenizer.encode(text, return_tensors="pt", add_special_tokens=True)
+
+generated_ids = t5.generate(
+        input_ids=input_ids,
+        num_beams=1,
+        max_length=40,
+        #repetition_penalty=2.5
+    ).squeeze()
+    
+predicted_span = tokenizer.decode(generated_ids, skip_special_tokens=True, clean_up_tokenization_spaces=True)
+
+
+```