[fbsync] fix typo in 'swin_transformer.rst' docs (#6294)

Summary: Co-authored-by: Nicolas Hug <[email protected]>

Reviewed By: datumbox

Differential Revision: D38070866

fbshipit-source-id: e6c612e2d5af0503497bfd50863ccde6cf71a106

Author: NicolasHug

docs/source/models/swin_transformer.rst

@@ -11,7 +11,7 @@ paper.
 Model builders
 --------------
 
-The following model builders can be used to instanciate an SwinTransformer model. 
+The following model builders can be used to instantiate an SwinTransformer model. 
 `swin_t` can be instantiated with pre-trained weights and all others without. 
 All the model builders internally rely on the ``torchvision.models.swin_transformer.SwinTransformer`` 
 base class. Please refer to the `source code