[docs] fixed links with 404 (#27327)

* fixed links with 404

* make style

src/transformers/models/vit/modeling_flax_vit.py

@@ -38,9 +38,10 @@ VIT_START_DOCSTRING = r"""
     This model inherits from [`FlaxPreTrainedModel`]. Check the superclass documentation for the generic methods the
     library implements for all its model (such as downloading, saving and converting weights from PyTorch models)
 
-    This model is also a Flax Linen [flax.linen.Module](https://flax.readthedocs.io/en/latest/flax.linen.html#module)
-    subclass. Use it as a regular Flax linen Module and refer to the Flax documentation for all matter related to
-    general usage and behavior.
+    This model is also a
+    [flax.linen.Module](https://flax.readthedocs.io/en/latest/api_reference/flax.linen/module.html) subclass. Use it as
+    a regular Flax linen Module and refer to the Flax documentation for all matter related to general usage and
+    behavior.
 
     Finally, this model supports inherent JAX features such as:
 

src/transformers/models/xlm_roberta/modeling_flax_xlm_roberta.py

@@ -88,9 +88,10 @@ XLM_ROBERTA_START_DOCSTRING = r"""
     This model inherits from [`FlaxPreTrainedModel`]. Check the superclass documentation for the generic methods the
     library implements for all its model (such as downloading, saving and converting weights from PyTorch models)
 
-    This model is also a Flax Linen [flax.linen.Module](https://flax.readthedocs.io/en/latest/flax.linen.html#module)
-    subclass. Use it as a regular Flax linen Module and refer to the Flax documentation for all matter related to
-    general usage and behavior.
+    This model is also a
+    [flax.linen.Module](https://flax.readthedocs.io/en/latest/api_reference/flax.linen/module.html) subclass. Use it as
+    a regular Flax linen Module and refer to the Flax documentation for all matter related to general usage and
+    behavior.
 
     Finally, this model supports inherent JAX features such as:
 

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/modeling_flax_{{cookiecutter.lowercase_modelname}}.py

@@ -63,7 +63,7 @@ _TOKENIZER_FOR_DOC = "{{cookiecutter.camelcase_modelname}}Tokenizer"
     generic methods the library implements for all its model (such as downloading, saving and converting weights from
     PyTorch models)
 
-    This model is also a Flax Linen [flax.linen.Module](https://flax.readthedocs.io/en/latest/flax.linen.html#module) subclass. Use it as a regular Flax linen Module
+    This model is also a Flax Linen [flax.linen.Module](https://flax.readthedocs.io/en/latest/api_reference/flax.linen/module.html) subclass. Use it as a regular Flax linen Module
     and refer to the Flax documentation for all matter related to general usage and behavior.
 
     Finally, this model supports inherent JAX features such as:

templates/adding_a_new_model/open_model_proposals/ADD_BIG_BIRD.md

@@ -7,7 +7,7 @@ Begin: 12.02.2020
 
 Estimated End: 19.03.2020
 
-Contributor: [Vasudev](https://github.com/vasudevgupta7)
+Contributor: [Vasudev](https://github.com/thevasudevgupta)
 
 Adding a new model is often difficult and requires an in-depth knowledge
 of the 🤗 Transformers library and ideally also of the model's original