fixed link (#3860)

* changed link

* Update README.md

* updated card

* Update model_card.md

parlai/zoo/blenderbot2/model_card.md

@@ -1,4 +1,4 @@
-# BlenderBot 2.0
+# BlenderBot 2.0 2.7B
 
 On this page, you can learn more about how well BlenderBot 2.0 performs on open-domain dialogues and how the model is developed.
 

projects/blenderbot2/README.md

@@ -83,7 +83,7 @@ Nevertheless, as ever much work remains to be done in the area of safety. While
 ### Model Zoo
 
 - BlenderBot 2.0 400m: `--model-file zoo:blenderbot2/blenderbot2_400M/model`
-- BlenderBot 2.0 2.7B: `--model-file zoo:blenderbot2/blenderbot2_3B/model`
+- BlenderBot 2.0 2.7B ([model card](https://github.com/facebookresearch/ParlAI/blob/master/parlai/zoo/blenderbot2/model_card.md)): `--model-file zoo:blenderbot2/blenderbot2_3B/model`
 
 ## Datasets
 
@@ -94,11 +94,6 @@ Finally, to train for safety we use the [BAD dataset](https://parl.ai/projects/s
 See the [ParlAI quickstart for help](http://www.parl.ai/docs/tutorial_quick.html).
 
 
-## Model Card
-[BlenderBot 2 Model Card](../../parlai/zoo/blenderbot2/model_card.md)
-
-
-
 ## Contributors
 Moya Chen, Douwe Kiela, Mojtaba Komeili, Spencer Poff, Stephen Roller, Kurt Shuster, Arthur Szlam, Jason Weston, Jing Xu.
 Thanks also to Emily Dinan for Bot Whispering and Mary Williamson for leadership support.