Update deepset/roberta-base-squad2 model card (#8522)

* Update README.md

* Update README.md

Author: brandenchan

model_cards/deepset/roberta-base-squad2/README.md

@@ -5,7 +5,7 @@ datasets:
 
 # roberta-base for QA 
 
-NOTE: This model has been superseded by deepset/roberta-base-squad2-v2. For an explanation of why, see [this github issue](https://github.com/deepset-ai/FARM/issues/552) from the FARM repository.
+NOTE: This is version 2 of the model. See [this github issue](https://github.com/deepset-ai/FARM/issues/552) from the FARM repository for an explanation of why we updated. If you'd like to use version 1, specify `revision="v1.0"` when loading the model in Transformers 3.5.
 
 ## Overview
 **Language model:** roberta-base  
@@ -19,10 +19,10 @@ NOTE: This model has been superseded by deepset/roberta-base-squad2-v2. For an e
 ## Hyperparameters
 
 ```
-batch_size = 50
-n_epochs = 3
+batch_size = 96
+n_epochs = 2
 base_LM_model = "roberta-base"
-max_seq_len = 384
+max_seq_len = 386
 learning_rate = 3e-5
 lr_schedule = LinearWarmup
 warmup_proportion = 0.2
@@ -32,9 +32,18 @@ max_query_length=64
 
 ## Performance
 Evaluated on the SQuAD 2.0 dev set with the [official eval script](https://worksheets.codalab.org/rest/bundles/0x6b567e1cf2e041ec80d7098f031c5c9e/contents/blob/).
+
 ```
-"exact": 78.49743114629833,
-"f1": 81.73092721240889
+"exact": 79.97136359807968
+"f1": 83.00449234495325
+
+"total": 11873
+"HasAns_exact": 78.03643724696356
+"HasAns_f1": 84.11139298441825
+"HasAns_total": 5928
+"NoAns_exact": 81.90075693860386
+"NoAns_f1": 81.90075693860386
+"NoAns_total": 5945
 ```
 
 ## Usage
@@ -85,7 +94,7 @@ For doing QA at scale (i.e. many docs instead of single paragraph), you can load
 ```python
 reader = FARMReader(model_name_or_path="deepset/roberta-base-squad2")
 # or 
-reader = TransformersReader(model="deepset/roberta-base-squad2",tokenizer="deepset/roberta-base-squad2")
+reader = TransformersReader(model_name_or_path="deepset/roberta-base-squad2",tokenizer="deepset/roberta-base-squad2")
 ```